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

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1. 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. 1. 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.