**Independent Events 獨立事件**

**Definition**
若下列條件對任意三件事 *E*, *F* 和 *G* 都成立, 則稱 *E*,*F*和 *G* 為獨立事件.

另外, 當 *E*,*F* 和 *G* 為獨立事件時, 則 *E* 亦獨立於任何由 *F* 和 *G*所組成的事件. 例如, 當*E* 獨立於 ,
因為

Of course, we may also extend the definition of independence to more than three events. The events are said to be independent if, for every subset , of these events