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Question

Given two independent events A and B such that P(A)=0.3, P(B)=0.6. Find
(i) P(A and not B) (ii) P(neither A nor B)

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Solution

We have,

P(A)=0.3,P(B)=0.6

So,P(¯¯¯¯A)=10.3=0.7

AndP(¯¯¯¯B)=10.6=0.4

Part (a)

P(A and not B)=P(A)×P(¯¯¯¯B)

P(A and not B)=0.3×0.4=0.12

Part (b)

P(neither A and nor B)=P(¯¯¯¯A)×P(¯¯¯¯B)

P(A neither A and nor B)=0.7×0.4=0.28


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