Let A and B be two events. Suppose P(A)=0.4, P(B)=p, and P(A ∪ B)=0.7. The value offor which A an...

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Let A and B be two events. Suppose P(A)=0.4, P(B)=p, and P(A ∪ B)=0.7. The value offor which A and B are independent is
(1) 1 / 3
(2) 1 / 4
(3) 1 / 2
(4) 1 / 5

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