A company has three claims representatives who have 8 hour working days, Monday to Friday. Clients come to the offices of the company at a rate of 20 clients per 8 hour day. The time a representative spends to each customer obeys an exponential law with an average service time of 36 minutes. In taking the hour as a unit of time, answer the following questions: (a) How many hours per week is a representative busy on average? (b) What is the average time spent by a customer in the queue before being served by a representative? (c) What is the average number of representatives who are unoccupied? (d) What is the probability that there is a queue?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A company has three claims representatives who have 8 hour working days, Monday to Friday. Clients come to the offices of the company at a rate of 20 clients per 8 hour day. The time a representative spends to each customer obeys an exponential law with an average service time of 36 minutes. In taking the hour as a unit of time, answer the following questions:

(a)

How many hours per week is a representative busy on average?

 

(b)

What is the average time spent by a customer in the queue before being served by a representative?

 

(c)

What is the average number of representatives who are unoccupied?

 

(d)

What is the probability that there is a queue?

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