An instructor has given a short quiz consisting of two parts. For a randomly selected student, let
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An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X = the number of points earned on the first part and Y = the number of points earned on the second part. Suppose that the joint pmf of X and Y is given in the accompanying table. p(x, y) y 0 5 10 15 .02 .06 .02 .10 x 5 .04 .15 .20 .10 10 .01 .15 .14 .01
a. If the score recorded in the grade book is the total num- ber of points earned on the two parts, what is the expected recorded score E(X + Y)?
b. If the maximum of the two scores is recorded, what is the expected recorded score?
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Probability And Statistics For Engineering And The Sciences
ISBN: 9781133169345
8th Edition
Authors: Jay L Devore, Roger Ellsbury
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