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4.1-3. Let the joint pmf of X and Y be defined by f(x,y)=32x+y,x=1,2,y=1,2,3,4 a. Find fX(x), the
marginal pmf of X. b. Find fY(y), the marginal pmf of Y. c. Find P(X>Y). d. Find P(Y=2X). e. Find P(
X+Y=3). f. Find P(X3Y). g. Are X and Y independent or dependent? Why or why not? h. Find the
means and the variances of X and Y.

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