Consider randomly selecting a student at a large university, and let A be the event that the selected student has a Visa card and B be the analogous event for MasterCard. Suppose that P(A) = 0.3, P(B) = 0.4, and P(AN B) = 0.15. %3D %3D %3D What is the probability that the selected student has at least one of these two types of cards? Calculate the probability that the selected student has exactly one of the two types of cards. Are the events independent? Justify your answer.

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