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Given P(A)=0.4 and P(AuuB)=0.7. Find P(B...

Given `P(A)=0.4` and `P(AuuB)=0.7`. Find `P(B)` if (i) A and B are mutually exclusive (ii) A and B are independent events (iii) `P(A//B)=0.4,` (iv) `P(B//A)=0.5`

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