4. From the sample space S = {2, 3, 4, 5, 6, 7, 8, 9), a single number is to be selected randomly. Given the events: A: selected number is greather than 5, and B selected number is a multiple of 3. find each probability: a) One draw is involved, what's P(B) b) Two draws are involved, one after the other. What P(A and B)? c) two draws are involved, one after the other. What's P(B | A)

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