Given the random variables x and y in problem 421 find a
Given the random variables X and Y in Problem 4.2.1, find
(a) The marginal PMFs PX (x) and PY (y),
(b) The expected values E[X] and E[Y],
(c) The standard deviations σX and σY.
Problem 4.2.1
Random variables X and Y have the joint PMF
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