设事件A,B相互独立,且P(A)=0.2,P(B)=0.4,则P(A∪B)= ___________。
0.52,P(A∪B)=P(A) +P(B) -P(AB) =P(A)+P(B)-P(A)P(B)=0.52. 点拨:P(A∪B)=P(A) +P(B) -P(AB).
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