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4613 3. The joint PMF of two continuous random variables X and Y is given by [ke (2x+3y) x20, y 20 f(x, y) otherwise a.

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4613 3. The joint PMF of two continuous random variables X and Y is given by [ke (2x+3y) x20, y 20 f(x, y) otherwise a. Determine the value of the constant k that makes f(x,y) a true joint PDF b. Find the marginal PDFs of X and Y c. Whether X and Y are independent d. Find P[X

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