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Suppose X is a discrete random variable with the probability distribution given in the following table X 5 10 15 20 P(x) 0.1 3a 0.70

Suppose X is a discrete random variable with the probability distribution given in the following table X 5 10 15 20 P(x) 0.1 3a 0.70 a a. Find the value of a b. Find the mean, variance of X c. Find P( X > 15) and P( X

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