Concept explainers
The total time from arrival to completion of service at a fast-food outlet, Y1, and the time spent waiting in line before arriving at the service window, Y2, were given in Exercise 5.15 with joint density
Another random variable of interest is U = Y1 − Y2, the time spent at the service window. Find
- a the probability density function for U.
- b E(U) and V(U). Compare your answers with the results of Exercise 5.108.
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Chapter 6 Solutions
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