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3. Suppose that the probability mass function of a discrete random variable X is given by f(x) = for a = 1, 2, 3..... otherwise.

3. Suppose that the probability mass function of a discrete random variable X is given by f(x) = for a = 1, 2, 3..... otherwise. (a) (3 points) Find the probability that X is odd (a) (b) (4 points) Calculate E[X]

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