diff --git a/your-code/main.ipynb b/your-code/main.ipynb
index b8b7a9c..accc7cf 100644
--- a/your-code/main.ipynb
+++ b/your-code/main.ipynb
@@ -24,7 +24,19 @@
    "outputs": [],
    "source": [
     "\"\"\"\n",
-    "your solution here\n",
+    "The first statement is False:\n",
+    "P(A U B) = P(A) + P(B) - P(A and B)\n",
+    "P(A U B) = 0.30 + 0.60 - 0.10\n",
+    "P(A U B) = 0.80\n",
+    "\n",
+    "The second statement is True.\n",
+    "\n",
+    "The third statement is False.\n",
+    "\n",
+    "The fourth statement is False\n",
+    "\n",
+    "The fifth statement is True.\n",
+    "\n",
     "\"\"\""
    ]
   },
@@ -49,7 +61,13 @@
    "outputs": [],
    "source": [
     "\"\"\"\n",
-    "your solution here\n",
+    "Taking a white ball out: 10/30 = 1/3\n",
+    "\n",
+    "Taking a white ball out after taking a black ball out: 10/29\n",
+    "\n",
+    "Taking a red ball out after taking a black and a red ball out: 11/28\n",
+    "\n",
+    "Taking a red ball out after taking a black and a red ball out with reposition: 12/30\n",
     "\"\"\""
    ]
   },
@@ -75,7 +93,11 @@
    "outputs": [],
    "source": [
     "\"\"\"\n",
-    "your solution here\n",
+    "P(A|B) = (P(B|A) * P(A)) / P(B)\n",
+    "       = 0.50 * 0.10 / 0.40\n",
+    "       = 0.125 = 12.5%\n",
+    "\n",
+    "12.5%\n",
     "\"\"\""
    ]
   },
@@ -102,28 +124,105 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code here"
+    "import pandas as pd"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "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>men</th>\n",
+       "      <th>women</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>yes</th>\n",
+       "      <td>324</td>\n",
+       "      <td>351</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>no</th>\n",
+       "      <td>156</td>\n",
+       "      <td>169</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     men  women\n",
+       "yes  324    351\n",
+       "no   156    169"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "\"\"\"\n",
-    "your solution here\n",
-    "\"\"\""
+    "survey = pd.DataFrame({\n",
+    "    \"men\": {\"yes\": 324, \"no\": 156},\n",
+    "    \"women\": {\"yes\": 351, \"no\": 169}})\n",
+    "\n",
+    "survey"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "67.5\n",
+      "67.5\n"
+     ]
+    }
+   ],
+   "source": [
+    "men_yes = 324/480*100\n",
+    "women_yes = 351/520*100\n",
+    "\n",
+    "print(men_yes)\n",
+    "print(women_yes)\n",
+    "\n",
+    "#The gender is irrelevant to the question."
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -137,7 +236,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.2"
+   "version": "3.10.9"
   }
  },
  "nbformat": 4,