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Suppose that three marbles are chosen without replacement from a bowl consisting of 5 white and 8 red marbles. Let X, equal 1 if

Suppose that three marbles are chosen without replacement from a bowl consisting of 5 white and 8 red marbles. Let X, equal 1 if the ith ball selected is white and 0 otherwise. 1. (a) Give the joint probability mass funetion of X, and X2. (b) Give the joint probability mass function of X, and X2 when the marble selected is replaced in the bowl before the next selection.

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