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 12 calls per hour. The arrival rate is 20 calls per hour. How many extension lines should be used if the company wants to handle 90% of the calls immediately? b. What percentage of calls receive a busy signal for the current telephone system with two extension lines? c. What percentage of calls are handled by the representative if the company has a telephone system with three extension lines? d. What is the average number of extension lines that will be busy if the company wants to handle 90% of the calls immediately? What percentage of calls receive a busy signal if the company has additional two extension lines?

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 12 calls per hour. The arrival rate is 20 calls per hour. How many extension lines should be used if the company wants to handle 90% of the calls immediately? b. What percentage of calls receive a busy signal for the current telephone system with two extension lines? c. What percentage of calls are handled by the representative if the company has a telephone system with three extension lines? d. What is the average number of extension lines that will be busy if the company wants to handle 90% of the calls immediately? What percentage of calls receive a busy signal if the company has additional two extension lines?

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter2: Working With Real Numbers

Section2.3: Rules For Addition

Problem 7P

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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 12 calls per hour. The arrival rate is 20 calls per hour. a. How many extension lines should be used if the company wants to handle 90% of the calls immediately? b. What is the average number of extension lines that will be busy if your recommendation in part (a) is used? c. What percentage of calls receive a busy signal for the current telephone system with two extension lines?
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