设P(A)=0.5,P(B)=0.6,P(B|A反)=0.4,求P(AB).

设P(A)=0.5,P(B)=0.6,P(B|A反)=0.4,求P(AB).

P(B|A反)=(P(B)-P(AB))/(1-P(A))
P(AB)=0.4

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