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1. Determine whether or not the following distribution is a probability mass function. If the distribution is not a probability distribution, give the characteristics which

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1. Determine whether or not the following distribution is a probability mass function. If the distribution is not a probability distribution, give the characteristics which is not satisfied by the distribution. (a) f(x) = P( X = 2) = 16' for x = 1, 2, 3, 4, 5 (b) f (2) = P(X = 20) = 30 for x = 1, 2, 3, 4

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