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The PMF of a random variable X is given by Px (k) = c/k2 for k E {1, 2, ...,} a) Determine the constant c.

The PMF of a random variable X is given by Px (k) = c/k2 for k E {1, 2, ...,} a) Determine the constant c. b) Find the probability P(X 2 4). c) Find the probability P(6

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