Customers Arrive at Drive-Thru Window at the Local Fast Food

question 74

Multiple Choice

Customers arrive at drive-thru window at the local fast food place at an average rate of 12 per hour, following a Poisson distribution. The server at the window can service an average of 3 cars every 12 minutes with service times described by an exponential distribution. The manager asks you to help him figure out the following:

• A) average utilization
• B) average time a customer spends in line waiting to enter the drive-thru bay
• C) average number of customers waiting in line
• D) probability of having more than 4 cars in the system

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