diff --git a/your-code/pandas_1.ipynb b/your-code/pandas_1.ipynb
index 4f428ac..4b2cd1e 100644
--- a/your-code/pandas_1.ipynb
+++ b/your-code/pandas_1.ipynb
@@ -18,7 +18,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 218,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -35,7 +35,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 219,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -44,10 +44,34 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 220,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0     5.7\n",
+       "1    75.2\n",
+       "2    74.4\n",
+       "3    84.0\n",
+       "4    66.5\n",
+       "5    66.3\n",
+       "6    55.8\n",
+       "7    75.7\n",
+       "8    29.1\n",
+       "9    43.7\n",
+       "dtype: float64"
+      ]
+     },
+     "execution_count": 220,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "series_1 = pd.Series(lst)\n",
+    "series_1"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -60,10 +84,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 221,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "74.4"
+      ]
+     },
+     "execution_count": 221,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "series_1[2]"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -74,7 +111,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 222,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -92,10 +129,145 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 223,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>0</th>\n",
+       "      <th>1</th>\n",
+       "      <th>2</th>\n",
+       "      <th>3</th>\n",
+       "      <th>4</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>53.1</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>67.5</td>\n",
+       "      <td>35.0</td>\n",
+       "      <td>78.4</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>61.3</td>\n",
+       "      <td>40.8</td>\n",
+       "      <td>30.8</td>\n",
+       "      <td>37.8</td>\n",
+       "      <td>87.6</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>20.6</td>\n",
+       "      <td>73.2</td>\n",
+       "      <td>44.2</td>\n",
+       "      <td>14.6</td>\n",
+       "      <td>91.8</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>57.4</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>96.1</td>\n",
+       "      <td>4.2</td>\n",
+       "      <td>69.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>83.6</td>\n",
+       "      <td>20.5</td>\n",
+       "      <td>85.4</td>\n",
+       "      <td>22.8</td>\n",
+       "      <td>35.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>49.0</td>\n",
+       "      <td>69.0</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>31.8</td>\n",
+       "      <td>89.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>23.3</td>\n",
+       "      <td>40.7</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>83.8</td>\n",
+       "      <td>26.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>27.6</td>\n",
+       "      <td>26.4</td>\n",
+       "      <td>53.8</td>\n",
+       "      <td>88.8</td>\n",
+       "      <td>68.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>96.6</td>\n",
+       "      <td>96.4</td>\n",
+       "      <td>53.4</td>\n",
+       "      <td>72.4</td>\n",
+       "      <td>50.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>73.7</td>\n",
+       "      <td>39.0</td>\n",
+       "      <td>43.2</td>\n",
+       "      <td>81.6</td>\n",
+       "      <td>34.7</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "      0     1     2     3     4\n",
+       "0  53.1  95.0  67.5  35.0  78.4\n",
+       "1  61.3  40.8  30.8  37.8  87.6\n",
+       "2  20.6  73.2  44.2  14.6  91.8\n",
+       "3  57.4   0.1  96.1   4.2  69.5\n",
+       "4  83.6  20.5  85.4  22.8  35.9\n",
+       "5  49.0  69.0   0.1  31.8  89.1\n",
+       "6  23.3  40.7  95.0  83.8  26.9\n",
+       "7  27.6  26.4  53.8  88.8  68.5\n",
+       "8  96.6  96.4  53.4  72.4  50.1\n",
+       "9  73.7  39.0  43.2  81.6  34.7"
+      ]
+     },
+     "execution_count": 223,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "df_1 = pd.DataFrame(b)\n",
+    "df_1"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -106,7 +278,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 224,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -124,20 +296,147 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 225,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Score_1</th>\n",
+       "      <th>Score_2</th>\n",
+       "      <th>Score_3</th>\n",
+       "      <th>Score_4</th>\n",
+       "      <th>Score_5</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>53.1</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>67.5</td>\n",
+       "      <td>35.0</td>\n",
+       "      <td>78.4</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>61.3</td>\n",
+       "      <td>40.8</td>\n",
+       "      <td>30.8</td>\n",
+       "      <td>37.8</td>\n",
+       "      <td>87.6</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>20.6</td>\n",
+       "      <td>73.2</td>\n",
+       "      <td>44.2</td>\n",
+       "      <td>14.6</td>\n",
+       "      <td>91.8</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>57.4</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>96.1</td>\n",
+       "      <td>4.2</td>\n",
+       "      <td>69.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>83.6</td>\n",
+       "      <td>20.5</td>\n",
+       "      <td>85.4</td>\n",
+       "      <td>22.8</td>\n",
+       "      <td>35.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>49.0</td>\n",
+       "      <td>69.0</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>31.8</td>\n",
+       "      <td>89.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>23.3</td>\n",
+       "      <td>40.7</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>83.8</td>\n",
+       "      <td>26.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>27.6</td>\n",
+       "      <td>26.4</td>\n",
+       "      <td>53.8</td>\n",
+       "      <td>88.8</td>\n",
+       "      <td>68.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>96.6</td>\n",
+       "      <td>96.4</td>\n",
+       "      <td>53.4</td>\n",
+       "      <td>72.4</td>\n",
+       "      <td>50.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>73.7</td>\n",
+       "      <td>39.0</td>\n",
+       "      <td>43.2</td>\n",
+       "      <td>81.6</td>\n",
+       "      <td>34.7</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "   Score_1  Score_2  Score_3  Score_4  Score_5\n",
+       "0     53.1     95.0     67.5     35.0     78.4\n",
+       "1     61.3     40.8     30.8     37.8     87.6\n",
+       "2     20.6     73.2     44.2     14.6     91.8\n",
+       "3     57.4      0.1     96.1      4.2     69.5\n",
+       "4     83.6     20.5     85.4     22.8     35.9\n",
+       "5     49.0     69.0      0.1     31.8     89.1\n",
+       "6     23.3     40.7     95.0     83.8     26.9\n",
+       "7     27.6     26.4     53.8     88.8     68.5\n",
+       "8     96.6     96.4     53.4     72.4     50.1\n",
+       "9     73.7     39.0     43.2     81.6     34.7"
+      ]
+     },
+     "execution_count": 225,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "colnames = ['Score_1', 'Score_2', 'Score_3', 'Score_4', 'Score_5']"
+    "colnames = ['Score_1', 'Score_2', 'Score_3', 'Score_4', 'Score_5']\n",
+    "df_1.columns = colnames\n",
+    "df_1"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -147,10 +446,123 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 226,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Score_1</th>\n",
+       "      <th>Score_3</th>\n",
+       "      <th>Score_5</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>53.1</td>\n",
+       "      <td>67.5</td>\n",
+       "      <td>78.4</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>61.3</td>\n",
+       "      <td>30.8</td>\n",
+       "      <td>87.6</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>20.6</td>\n",
+       "      <td>44.2</td>\n",
+       "      <td>91.8</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>57.4</td>\n",
+       "      <td>96.1</td>\n",
+       "      <td>69.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>83.6</td>\n",
+       "      <td>85.4</td>\n",
+       "      <td>35.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>49.0</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>89.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>23.3</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>26.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>27.6</td>\n",
+       "      <td>53.8</td>\n",
+       "      <td>68.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>96.6</td>\n",
+       "      <td>53.4</td>\n",
+       "      <td>50.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>73.7</td>\n",
+       "      <td>43.2</td>\n",
+       "      <td>34.7</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "   Score_1  Score_3  Score_5\n",
+       "0     53.1     67.5     78.4\n",
+       "1     61.3     30.8     87.6\n",
+       "2     20.6     44.2     91.8\n",
+       "3     57.4     96.1     69.5\n",
+       "4     83.6     85.4     35.9\n",
+       "5     49.0      0.1     89.1\n",
+       "6     23.3     95.0     26.9\n",
+       "7     27.6     53.8     68.5\n",
+       "8     96.6     53.4     50.1\n",
+       "9     73.7     43.2     34.7"
+      ]
+     },
+     "execution_count": 226,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "df_2 = df_1.drop(columns=[\"Score_2\", \"Score_4\"])\n",
+    "df_2"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -161,10 +573,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 227,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "56.95000000000001"
+      ]
+     },
+     "execution_count": 227,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "average = df_1.Score_3.mean()\n",
+    "average"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -175,10 +601,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 228,
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "max_score = df_1.Score_4.max() \n",
+    "max_score\n",
+    "\n",
+    "#same as:\n",
+    "\n",
+    "max_score = df_1[\"Score_4\"].max() "
+   ]
   },
   {
    "cell_type": "markdown",
@@ -189,10 +622,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 229,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "40.75"
+      ]
+     },
+     "execution_count": 229,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "median = df_1.Score_2.median()\n",
+    "median"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -203,7 +650,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 230,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -224,10 +671,134 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 231,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Description</th>\n",
+       "      <th>Quantity</th>\n",
+       "      <th>UnitPrice</th>\n",
+       "      <th>Revenue</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>LUNCH BAG APPLE DESIGN</td>\n",
+       "      <td>1</td>\n",
+       "      <td>1.65</td>\n",
+       "      <td>1.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>SET OF 60 VINTAGE LEAF CAKE CASES</td>\n",
+       "      <td>24</td>\n",
+       "      <td>0.55</td>\n",
+       "      <td>13.20</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>RIBBON REEL STRIPES DESIGN</td>\n",
+       "      <td>1</td>\n",
+       "      <td>1.65</td>\n",
+       "      <td>1.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>WORLD WAR 2 GLIDERS ASSTD DESIGNS</td>\n",
+       "      <td>2880</td>\n",
+       "      <td>0.18</td>\n",
+       "      <td>518.40</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>PLAYING CARDS JUBILEE UNION JACK</td>\n",
+       "      <td>2</td>\n",
+       "      <td>1.25</td>\n",
+       "      <td>2.50</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>POPCORN HOLDER</td>\n",
+       "      <td>7</td>\n",
+       "      <td>0.85</td>\n",
+       "      <td>5.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>BOX OF VINTAGE ALPHABET BLOCKS</td>\n",
+       "      <td>1</td>\n",
+       "      <td>11.95</td>\n",
+       "      <td>11.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>PARTY BUNTING</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.95</td>\n",
+       "      <td>19.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>JAZZ HEARTS ADDRESS BOOK</td>\n",
+       "      <td>10</td>\n",
+       "      <td>0.19</td>\n",
+       "      <td>1.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>SET OF 4 SANTA PLACE SETTINGS</td>\n",
+       "      <td>48</td>\n",
+       "      <td>1.25</td>\n",
+       "      <td>60.00</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                          Description  Quantity  UnitPrice  Revenue\n",
+       "0              LUNCH BAG APPLE DESIGN         1       1.65     1.65\n",
+       "1  SET OF 60 VINTAGE LEAF CAKE CASES         24       0.55    13.20\n",
+       "2         RIBBON REEL STRIPES DESIGN          1       1.65     1.65\n",
+       "3   WORLD WAR 2 GLIDERS ASSTD DESIGNS      2880       0.18   518.40\n",
+       "4    PLAYING CARDS JUBILEE UNION JACK         2       1.25     2.50\n",
+       "5                      POPCORN HOLDER         7       0.85     5.95\n",
+       "6      BOX OF VINTAGE ALPHABET BLOCKS         1      11.95    11.95\n",
+       "7                       PARTY BUNTING         4       4.95    19.80\n",
+       "8            JAZZ HEARTS ADDRESS BOOK        10       0.19     1.90\n",
+       "9       SET OF 4 SANTA PLACE SETTINGS        48       1.25    60.00"
+      ]
+     },
+     "execution_count": 231,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "products = pd.DataFrame(orders)\n",
+    "products"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -238,10 +809,34 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 232,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2978\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "637.0"
+      ]
+     },
+     "execution_count": 232,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "total_quantity = products.Quantity.sum()\n",
+    "print(total_quantity)\n",
+    "\n",
+    "total_revenue = products.Revenue.sum()\n",
+    "total_revenue\n"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -252,10 +847,34 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 233,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "11.95\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "0.18"
+      ]
+     },
+     "execution_count": 233,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "most_expensive = products.UnitPrice.max()\n",
+    "print(most_expensive)\n",
+    "\n",
+    "least_expensive = products.UnitPrice.min()\n",
+    "least_expensive"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -266,7 +885,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 234,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -285,10 +904,130 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 235,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "   Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0           1        337          118                  4  4.5  4.5  9.65   \n",
+       "1           2        316          104                  3  3.0  3.5  8.00   \n",
+       "2           3        322          110                  3  3.5  2.5  8.67   \n",
+       "3           4        314          103                  2  2.0  3.0  8.21   \n",
+       "4           5        330          115                  5  4.5  3.0  9.34   \n",
+       "\n",
+       "   Research  Chance of Admit  \n",
+       "0         1             0.92  \n",
+       "1         1             0.72  \n",
+       "2         1             0.80  \n",
+       "3         0             0.65  \n",
+       "4         1             0.90  "
+      ]
+     },
+     "execution_count": 235,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions.head()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -299,10 +1038,32 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 236,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Serial No.           0\n",
+       "GRE Score            0\n",
+       "TOEFL Score          0\n",
+       "University Rating    0\n",
+       "SOP                  0\n",
+       "LOR                  0\n",
+       "CGPA                 0\n",
+       "Research             0\n",
+       "Chance of Admit      0\n",
+       "dtype: int64"
+      ]
+     },
+     "execution_count": 236,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions.isna().sum()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -313,10 +1074,218 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 237,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>385</th>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 8 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "            GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "Serial No.                                                              \n",
+       "1                 337          118                  4  4.5  4.5  9.65   \n",
+       "2                 316          104                  3  3.0  3.5  8.00   \n",
+       "3                 322          110                  3  3.5  2.5  8.67   \n",
+       "4                 314          103                  2  2.0  3.0  8.21   \n",
+       "5                 330          115                  5  4.5  3.0  9.34   \n",
+       "...               ...          ...                ...  ...  ...   ...   \n",
+       "381               324          110                  3  3.5  3.5  9.04   \n",
+       "382               325          107                  3  3.0  3.5  9.11   \n",
+       "383               330          116                  4  5.0  4.5  9.45   \n",
+       "384               312          103                  3  3.5  4.0  8.78   \n",
+       "385               333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "            Research  Chance of Admit  \n",
+       "Serial No.                             \n",
+       "1                  1             0.92  \n",
+       "2                  1             0.72  \n",
+       "3                  1             0.80  \n",
+       "4                  0             0.65  \n",
+       "5                  1             0.90  \n",
+       "...              ...              ...  \n",
+       "381                1             0.82  \n",
+       "382                1             0.84  \n",
+       "383                1             0.91  \n",
+       "384                0             0.67  \n",
+       "385                1             0.95  \n",
+       "\n",
+       "[385 rows x 8 columns]"
+      ]
+     },
+     "execution_count": 237,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions.set_index(\"Serial No.\")\n"
+   ]
   },
   {
    "cell_type": "code",
@@ -334,10 +1303,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 293,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0"
+      ]
+     },
+     "execution_count": 293,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions.duplicated(subset=[\"GRE Score\", \"CGPA\"]).sum()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -348,10 +1330,220 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 239,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>10</th>\n",
+       "      <td>11</td>\n",
+       "      <td>328</td>\n",
+       "      <td>112</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.10</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.78</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>19</th>\n",
+       "      <td>20</td>\n",
+       "      <td>328</td>\n",
+       "      <td>116</td>\n",
+       "      <td>5</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>9.50</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.94</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>20</th>\n",
+       "      <td>21</td>\n",
+       "      <td>334</td>\n",
+       "      <td>119</td>\n",
+       "      <td>5</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.70</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>379</th>\n",
+       "      <td>380</td>\n",
+       "      <td>329</td>\n",
+       "      <td>111</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.23</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.89</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>101 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "10           11        328          112                  4  4.0  4.5  9.10   \n",
+       "19           20        328          116                  5  5.0  5.0  9.50   \n",
+       "20           21        334          119                  5  5.0  4.5  9.70   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "379         380        329          111                  4  4.5  4.0  9.23   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "4           1             0.90  \n",
+       "10          1             0.78  \n",
+       "19          1             0.94  \n",
+       "20          1             0.95  \n",
+       "..        ...              ...  \n",
+       "379         1             0.89  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[101 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 239,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "condition_1 = admissions[\"CGPA\"] > 9\n",
+    "condition_2 = admissions[\"Research\"] != 0\n",
+    "\n",
+    "admissions[condition_1 & condition_2]"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -362,17 +1554,244 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 240,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "0.8019999999999999\n"
+     ]
+    }
+   ],
+   "source": [
+    "condition_3 = admissions[\"CGPA\"] > 9\n",
+    "condition_4 = admissions[\"SOP\"] < 3.5\n",
+    "\n",
+    "print(admissions[condition_3 & condition_4][\"Chance of Admit\"].mean())\n",
+    "\n",
+    "\n",
+    "filtered_admisions = admissions[condition_3 & condition_4]\n",
+    "\n"
+   ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 241,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
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+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
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+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "1           1             0.72  \n",
+       "2           1             0.80  \n",
+       "3           0             0.65  \n",
+       "4           1             0.90  \n",
+       "..        ...              ...  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "383         0             0.67  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 241,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "#same as before different process\n",
+    "\n",
+    "filtered_admisions[\"Chance of Admit\"].mean()\n",
+    "admissions"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -384,10 +1803,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 244,
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "def toefl_grades (i):\n",
+    "    if i > 100:\n",
+    "        return True\n",
+    "    else:\n",
+    "        return False\n",
+    "        "
+   ]
   },
   {
    "cell_type": "markdown",
@@ -398,31 +1824,578 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 282,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>Decision</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>37</th>\n",
+       "      <td>38</td>\n",
+       "      <td>316</td>\n",
+       "      <td>105</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.2</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.49</td>\n",
+       "      <td>True</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "    Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "37          38        316          105                  2  2.5  2.5   8.2   \n",
+       "\n",
+       "    Research  Chance of Admit  Decision  \n",
+       "37         1             0.49      True  "
+      ]
+     },
+     "execution_count": 282,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions[\"Decision\"] = admissions[\"TOEFL Score\"].apply(toefl_grades)\n",
+    "admissions.sample()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Create a column called `decision2` in the `admissions` dataframe. Assign 1 to this column if the value of `SOP` is greater than 3 and 0 otherwise.    \n",
+    "HINT (use np.where)"
+   ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 286,
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "def sop_grades (i):\n",
+    "    if i > 3:\n",
+    "        return 1\n",
+    "    else:\n",
+    "        return 0\n"
+   ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 287,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
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+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
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+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>Decision</th>\n",
+       "      <th>decision2</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>True</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>True</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
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+       "      <td>...</td>\n",
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+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>True</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 11 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  Decision  decision2  \n",
+       "0           1             0.92      True          1  \n",
+       "1           1             0.72      True          0  \n",
+       "2           1             0.80      True          1  \n",
+       "3           0             0.65      True          0  \n",
+       "4           1             0.90      True          1  \n",
+       "..        ...              ...       ...        ...  \n",
+       "380         1             0.82      True          1  \n",
+       "381         1             0.84      True          0  \n",
+       "382         1             0.91      True          1  \n",
+       "383         0             0.67      True          1  \n",
+       "384         1             0.95      True          1  \n",
+       "\n",
+       "[385 rows x 11 columns]"
+      ]
+     },
+     "execution_count": 287,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions[\"decision2\"] = admissions[\"SOP\"].apply(sop_grades)\n",
+    "admissions"
+   ]
   },
   {
-   "cell_type": "markdown",
+   "cell_type": "code",
+   "execution_count": 295,
    "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
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+       "    .dataframe tbody tr th:only-of-type {\n",
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+       "  <thead>\n",
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+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
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+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>Decision</th>\n",
+       "      <th>decision2</th>\n",
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+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
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+       "      <td>103</td>\n",
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+       "      <td>2.0</td>\n",
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+       "      <td>8.21</td>\n",
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+       "      <td>True</td>\n",
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+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
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+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>True</td>\n",
+       "      <td>0</td>\n",
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+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>True</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 11 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  Decision  decision2  \n",
+       "0           1             0.92      True          1  \n",
+       "1           1             0.72      True          0  \n",
+       "2           1             0.80      True          1  \n",
+       "3           0             0.65      True          0  \n",
+       "4           1             0.90      True          1  \n",
+       "..        ...              ...       ...        ...  \n",
+       "380         1             0.82      True          1  \n",
+       "381         1             0.84      True          0  \n",
+       "382         1             0.91      True          1  \n",
+       "383         0             0.67      True          1  \n",
+       "384         1             0.95      True          1  \n",
+       "\n",
+       "[385 rows x 11 columns]"
+      ]
+     },
+     "execution_count": 295,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "Create a column called `decision2` in the `admissions` dataframe. Assign 1 to this column if the value of `SOP` is greater than 3 and 0 otherwise.    \n",
-    "HINT (use np.where)"
+    "# USING WHERE\n",
+    "\n",
+    "condition_5 = admissions[\"SOP\"] > 3\n",
+    "admissions[\"decision2\"] = np.where( condition_5, 1, 0)\n",
+    "admissions\n"
    ]
   },
   {
@@ -449,7 +2422,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.8"
+   "version": "3.11.5"
   },
   "toc": {
    "base_numbering": "",