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    Expected value and variance

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    The number of winter storms in a good year is Poisson random variable with mean 3, whereas the number in a bad year is a Poisson random variable with mean 5. If next year will be a good year with probability 0.4 or a bad year with probability 0.6, find the expected value and variance of the number of storms that will occur.

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    https://brainmass.com/math/probability/expected-value-variance-31313

    Solution Summary

    This shows how to find the expected value and variance with a Poisson distribution.

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