Ex 16.3, 14 - Given P(A) = 3/5, P(B) =  1/5. Find P(A or B) - Using formulae of sets

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  1. Chapter 16 Class 11 Probability
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Ex 16.3, 14 Given P(A) = 3﷮5﷯ and P(B) = 1﷮5﷯. Find P(A or B), if A and B are mutually exclusive events. P(A) = 3﷮5﷯ , P(B) = 1﷮5﷯ Since A and B are mutually excusive So, P(A ∩ B)= 0 Now, P(A or B) = P(A ∪ B) We know that P(A ∪ B) = P(A) + P(B) – P(A ∩ B) putting values P(A ∪ B) = 3﷮5﷯ + 1﷮5﷯ – 0 = 3 + 1﷮5﷯ = 4﷮5﷯ Hence, P(A ∪ B) = 𝟒﷮𝟓﷯

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