Solved: Suppose that the probabilities are 0.4, 0.3, 0.2,
Chapter 5, Problem 4.36(choose chapter or problem)
Suppose that the probabilities are 0.4, 0.3, 0.2, and 0.1, respectively, that 0, 1, 2, or 3 power failures will strike a certain subdivision in any given year. Find the mean and variance of the random variable X representing the number of power failures striking this subdivision.
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