Question

**Problem 15-31 (Algorithmic)**

Mid-West Publishing Company publishes college textbooks. The company operates an 800 telephone number whereby potential adopters can ask questions about forthcoming texts, request examination copies of texts, and place orders. Currently, two extension lines are used, with two representatives handling the telephone inquiries. Calls occurring when both extension lines are being used receive a busy signal; no waiting is allowed. Each representative can accommodate an average of 9 calls per hour. The arrival rate is 17 calls per hour.

- How many extension lines should be used if the company wants to
handle 80% of the calls immediately?

- What is the probability that a call will receive a busy signal
if your recommendation in part (a) is used? If required, round your
answer to four decimal places.

- What number of calls, in decimal form, receive a busy signal
for the current telephone system with two extension lines? If
required, round your answer to four decimal places.

Answer #1

Problem 11-31 (Algorithmic)
Mid-West Publishing Company publishes college textbooks. The
company operates an 800 telephone number whereby potential adopters
can ask questions about forthcoming texts, request examination
copies of texts, and place orders. Currently, two extension lines
are used, with two representatives handling the telephone
inquiries. Calls occurring when both extension lines are being used
receive a busy signal; no waiting is allowed. Each representative
can accommodate an average of 9 calls per hour. The arrival rate is
17 calls...

Mid-West Publishing Company publishes college textbooks. The
company operates an 800 telephone number whereby potential adopters
can ask questions about forthcoming texts, request examination
copies of texts, and place orders. Currently, two extension lines
are used, with two representatives handling the telephone
inquiries. Calls occurring when both extension lines are being used
receive a busy signal; no waiting is allowed. Each representative
can accommodate an average of 10 calls per hour. The arrival rate
is 16 calls per hour.
A)...

Mid-West Publishing
Company publishes college textbooks. The company operates an 800
telephone number whereby potential adopters can ask questions about
forthcoming texts, request examination copies of texts, and place
orders. Currently, two extension lines are used, with two
representatives handling the telephone inquiries. Calls occurring
when both extension lines are being used receive a busy signal; no
waiting is allowed. Each representative can accommodate an average
of 11 calls per hour. The arrival rate is 22 calls per hour.
How...

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