jjmne33 jjmne33

27-08-2021
Mathematics

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Find the missing probability. P(A)=2/5,P(B|A)=920,P(A∩B)

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LammettHash LammettHash

27-08-2021

I think you meant P(B | A) = 9/20.

By definition of conditional probability,

P(B | A) = P(A ∩ B) / P(A)

so that

P(A ∩ B) = P(A) × P(B | A) = 2/5 × 9/20 = 18/100 = 9/50

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