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Historical records of rainstorms in a town indicated that on average there had been 4 rainstorms per year over the last 20 years. Assume that

Historical records of rainstorms in a town indicated that on average there had been 4 rainstorms per year over the last 20 years. Assume that the occurrence of rainstorms is a Poisson process. a) What is the probability that there would be no rainstorms next year? b) What is the probability that there would be at least 2 rainstorms next year?

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