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Problem 1. (8 points) Three independent events have probabilities 0.2, 0.5 and 0.8. What is the probability that (a) (4 points) At last one of

Problem 1. (8 points) Three independent events have probabilities 0.2, 0.5 and 0.8. What is the probability that (a) (4 points) At last one of the events occur? (b) (4 points) Exatly two of the events occurs

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