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Consider randomly selecting a student at a large university. Let A be the event that the...

Consider randomly selecting a student at a large university. Let A be the event that the selected student has a Visa card, let B be the analogous event for MasterCard, and let C be the event that the selected student has an American Express card. Suppose that P(A) = 0.6,P(B) = 0.4,and P(A ∩ B) = 0.3,suppose that P(C) = 0.2,P(A ∩ C) = 0.12,P(B ∩ C) = 0.1, and P(A ∩ B ∩ C) = 0.08.

a)What is the probability that the selected student has at least one of the three types of cards?

b)What is the probability that the selected student has both a Visa card and a MasterCard but not an American Express card?

c)Calculate P(B | A)and P(A | B).

P(B | A)=

P(A | B)=

d)If we learn that the selected student has an American Express card, what is the probability that she or he also has both a Visa card and a MasterCard?

e)Given that the selected student has an American Express card, what is the probability that she or he has at least one of the other two types of cards?

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