P(AB) = P(A) - P(A-B) = 0.7 - 0.3 = 0.4
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设A,B为随机事件,且P(A)=0.7,P(A-B)=0.3,求P(AB)
设A,B为随机事件,且P(A)=0.7,P(A-B)=0.3,求P(AB)
数学人气:184 ℃时间:2019-12-19 23:33:49
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