Consider an Erlang loss system. The average processing time is 6 minutes. The average interarrival time is 3 minutes. The number of servers is 9. What is the capacity of the system?

• A. 1.1 customers per minute
• B. 0.8 customers per minute
• C. 1.5 customers per minute
• D. 2.4 customers per minute

C&A Printing takes 15 seconds to print a page in color, but after 500 pages, the printer must be cooled down for 15 minutes. No pages can be printed while the printer is cooling down. What is C&As capacity in pages per hour?

A. 214.3 B. 850.6 C. 6,000.4 D. 305.1

During the four hours of the morning rush from 6 a.m. to 10 a.m., 150 customers per hour arrive at a coffee shop. This coffee shop has a capacity of 120 customers per hour. On average, how long does a customer arriving during the morning rush wait to be served?

• A. 2 hours
• B. 0.25 hour
• C. 1 hour
• D. 0.5 hour