Update prob_concepts.ipynb

Author: dingran

prob_concepts.ipynb

@@ -52,12 +52,12 @@
     "$$P \\left( \\bigcup_{i=1}^{\\infty}A_i \\right) = \\sum_{i=1}^{\\infty}P(A_i) $$\n",
     "\n",
     "\n",
-    "Following the definiiton we properties:\n",
+    "Following the definiiton we have properties:\n",
     "- $P(A) + P(A^c)=1$\n",
     "- $A \\subseteq B \\Rightarrow P(A) \\leq P(B)$\n",
     "- $P(A \\cup B) = P(A) + P(B) - P(A \\cap B)$\n",
     "\n",
-    "The last properties can be further generalized into the [inclusion-exclusion theorem](https://en.wikipedia.org/wiki/Inclusion%E2%80%93exclusion_principle) for more than two sets."
+    "The last property can be generalized into the [inclusion-exclusion theorem](https://en.wikipedia.org/wiki/Inclusion%E2%80%93exclusion_principle) for more than two sets."
    ]
   },
   {