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in Mathematics by (72.7k points)

Let, A and B be two events such that P(A) = 0.3 and P(A ∪ B) = 0.8. If A and B are independent events, then P(B ) =... ..

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P (A  B) = P(A) + P(B) - P(A)P(B), as A and B are independent events

 0.8 = (0.3) + P(B) - (0.3) P(B)

 0.5 = (0.7)P(B )

 P (B) = 5/7

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