A market has both an express checkout line and a super express checkout line. Let X1 denote the number of customers in line at the express checkout at a particular time of day, and let X2 denote the number of customers in line at the super express checkout at the same time. Suppose the joint probability distribution of X1 and X2 is as given in the accompanying table. X2 1 2 0.08 0.07 0.04 0.00 1 0.06 0.15 0.05 0.04 X1 0.05 0.04 0.10 0.06 3 0.00 0.03 0.04 0.07 0.00 0.01 0.05 0.06 What is the probability that the total number of customers in the two lines is exactly four? O 11% O 17% O 15% O 4%

A market has both an express checkout line and a super express checkout line. Let X1 denote the number of customers in line at the express checkout at a particular time of day, and let X2 denote the number of customers in line at the super express checkout at the same time. Suppose the joint probability distribution of X1 and X2 is as given in the accompanying table. X2 1 2 0.08 0.07 0.04 0.00 1 0.06 0.15 0.05 0.04 X1 0.05 0.04 0.10 0.06 3 0.00 0.03 0.04 0.07 0.00 0.01 0.05 0.06 What is the probability that the total number of customers in the two lines is exactly four? O 11% O 17% O 15% O 4%

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter12: Probability

Section12.CR: Chapter 12 Review

Problem 15CR

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