An urn contains 7 red and 11 white balls. Draw one ball at random from the urn. Let X =
Chapter 2, Problem 2.4-1(choose chapter or problem)
An urn contains 7 red and 11 white balls. Draw one ball at random from the urn. Let X = 1 if a red ball is drawn, and let X = 0 if a white ball is drawn. Give the pmf, mean, and variance of X.
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