Mid-West Publishing Company publishes college textbooks. The company operates an 800 telephone number whereby potential adopters ca

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 3EQ: A florist offers three sizes of flower arrangements containing roses, daisies, and chrysanthemums....
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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.

 

  1. How many extension lines should be used if the company wants to handle 90% of the calls immediately?

    4

  2. What is the average number of extension lines that will be busy if your recommendation in part (a) is used? Round your answer to four decimal places.

    L = fill in the blank 

  3. What percentage of calls receive a busy signal for the current telephone system with two extension lines? Round your answer to two decimal places.

    40.0
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