1. Which of the following situations is not an example of a common queue?
A) a mailroom clerk following a computer-generated route
B) supermarket shoppers being served by checkout cashiers
C) commuters purchasing tickets at a busy railway station
D) photocopy machinery waiting to be repaired or maintained by a crew of service technicians
2) " During finals week, students arrive randomly at the help desk of the computer lab. There is only one technician due to budget cuts, and the time required to provide service varies from student to student. The average arrival rate is 15 students per hour, and the average service rate is 20 students per hour. Arrival rates have been found to follow the Poisson distribution, and the service times follow the exponential distribution. What is the average time spent waiting in line for each student?"
A) 15 minutes
B) 20 minutes
C) 5 minutes
D) 9 minutes
3) " The technician in question 20 claims he is always busy. Using the data from question 20/21, how often is he actually busy? "
A) 25 percent of the time
B) 75 percent of the time
C) 100 percent of the time
D) 95 percent of the time
4) "During the two hours of the morning rush, 100 customers per hour arrive at the coffee shop. The coffee shop has a capacity of 80 customers per hour. At what rate does the queue of customers at the coffee shop grow during this time? "
A) 100 customers per hour
B) 80 customers per hour
C) 40 customers per hour
D) 20 customers per hour