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# Probability mass function

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2.) Suppose X has probability mass function Pr{X = k} = c(k + 2) for k = -1, 0, 1, 2 . Find c, and compute the mean, variance, and standard deviation of X.
Let Y = 3X + 5. Compute the mean, variance and standard deviation of Y

##### Solution Summary

Given probability mass function the solution calculates mean, variance, and standard deviation.

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