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 						  algebra of events. ==The triple (Ω, F , P ) is a probability space
 						  or probability triple.==
 						- $$P (∅) = 0.$$
+						- For every finite $$A1 , A2 , · · · , An$$,
+						  ![image.png](../assets/image_1686901672954_0.png)
+						- For every event A, $$P (A) = 1 − P (A)$$.
 						-
 					- Properties of Probability
 			- LATER 学积分