A University Bookstore Opens a Booth and Buys Back Used

question 16

Essay

A university bookstore opens a booth and buys back used books during the final exam week. From 9 to 12 in the morning, students arrive at the rate of 35 per hour, on average. The bookstore employee can service an average of 40 students per hour.
a. What is the average length of the line?
b. What is the average time (in minutes) a student spends in the bookstore (system)?
c. What is the chance that the bookstore employee will be idle?

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