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A fair die is rolled five times. (a) Compute the joint p.m.f. of X and Y...

A fair die is rolled five times.

(a) Compute the joint p.m.f. of X and Y , where X is the first number rolled and Y is the largest of the five numbers rolled.

(b) Compute the joint p.m.f. of X and Y , where X is the first number rolled and Y is the number of 1’s rolled.

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