QUESTION 9 Two technicians (working separately) are responsible for the repair o

Question

QUESTION 9 Two technicians (working separately) are responsible for the repair of 16 cellular phone towers whenever the towers fail to work. On average, it takes a ½ day or a technician to repair a tower. When a tower breaks down, I both technicians are bus then the firs technician to become available will repair the tower. Each tower requires repair approximately once every six days. In order to provide sufficient customer service, at least 13 towers must be in running order. The probability that at least 13 towers will be in running order is a. 50%-60% O b. 60%-70% ?. 7096-8096 (-) d. 80%-90% e. 90%-100% QUESTION 10 With a single-server model, increasing the arrival rate by 10 percent and also increasing the service rate by 10 percent will result in a. no change in the average number of customers in the system, but a decrease in the average wait time. b. no change in either the average number of customers in the system, or the average wait time. c. an increase in both the average number of customers in the system, and the average wait time. d. a decrease in both the average number of customers in the system, and the average wait time.

Explanation / Answer

9. The probability that at least 13 towers will be running in order is

e. 90% - 100%

10. a. no change in the average number of customers in the system, but a decrease in the acerage wait time

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