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2. (4pts) Consider the following probability distribution for a discrete random variable X: P(X=k) 0.31 6 0.14 7 ? 10 0.09 (a) What P(X =

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2. (4pts) Consider the following probability distribution for a discrete random variable X: P(X=k) 0.31 6 0.14 7 ? 10 0.09 (a) What P(X = 7)? That is, find the missing value. (b) Using the value you found in part (a), compute the expected value (mean) of X

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