当事件A与B同时发生时,事件C必发生,则下列结论正确的是( )A.P(C)=P(AB) B.P(C)=P(A ∪B) C.P(C)≥JP(A)...

作者: tihaiku 人气: - 评论: 0
问题 当事件A与B同时发生时,事件C必发生,则下列结论正确的是( )
选项 A.P(C)=P(AB) B.P(C)=P(A ∪B) C.P(C)≥JP(A)+P(B)-1 D.P(C)≤P(A)+P(B)-1
答案 C
解析 由于,故P(C)≥P(A)+P(B)-P(A∪B)≥P(A)+P(B)-1。故选C。
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