Question: 19. A Inall has two elevators. Let A be the event that the rst elevator is busy, and let B be the event the second

19. A Inall has two elevators. Let A be the event that the rst elevator is busy, and let B be the event the second elevator is busy. Assume that P(A) = 0.2, P(B) = 0.3 and P(A H B) = 0.06. Find the probability that neither of the elevators is busy

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