Question: Consider four independent events A1, A2, A3, and A4, and let pi = P(Ai) for i = 1,2,3,4. Express the probability that at least one

Consider four independent events A1, A2, A3, and A4, and let pi = P(Ai) for i = 1,2,3,4. Express the probability that at least one of these four events occurs in terms of the pis, and do the same for the probability that at least two of the events occur.

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