The school of business has 3 fax machines. The toner in each machine needs to be changed after about 5 hours of use. There is one unit secretary who is responsible for the fax machine maintenance. It takes him 15 minutes to replace the toner cartridge.

Answer the following few questions with the title Fax machine maintenance.

Question 15: What percent of the time all the 3 fax machines are in working condition?

a) 14% b) 27% c) 73% d) 86% e) None of the above

Question 16: In the long run what is the average number of fax machines in the working condition?

a) 2.99 fax machine

b) 2.84 fax machine

c) 2.16 fax machine

d) 0.84 fax machine

e) 0.16 fax machine

Question 17: What is the average waiting time in the queue? a) 0.01 Hour b) 0.02 Hour c) 0.16 Hour d) 0.27 Hour e) None of the above

Question 18: What is the average time that a fax machine is down?

a) 0.01 Hour b) 0.02 Hour c) 0.24 Hour d) 0.27 Hour e) None of the above