∵A与B互不相容
∴P(AB)=0
∵P(B|A)=P(AB)÷P(A)
∴P(B|A)=0
选A
设随机事件A与B互不相容,P(A)=0.2,P(B)=0.4,则P(B|A)=( )
设随机事件A与B互不相容,P(A)=0.2,P(B)=0.4,则P(B|A)=( )
A.0 B.0.2 C.0.4 D.1
A.0 B.0.2 C.0.4 D.1
数学人气:354 ℃时间:2019-09-23 09:24:50
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