There is only one copying machine in the student lounge of the business school. Students arrive at the rate of λ=40 per hour​ (according to a Poisson​ distribution). Copying takes an average of 45 ​seconds, or μ=80 per hour​ (according to a negative exponential​ distribution).   a) The percentage of time the machine is used​ = 0.5 percent​ (round your response to the nearest whole​ number).   ​b) The average length of the queue​ = 0.50 students​ (round your response to two decimal​ places).   ​c) The average number of students in the system​ =  1 students​ (round your response to two decimal​ places).   ​d) The average time spent waiting in the queue​ =  ??? enter your response here minutes​ (round your response to two decimal​ places).

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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There is only one copying machine in the student lounge of the business school. Students arrive at the rate of λ=40 per hour​ (according to a Poisson​ distribution). Copying takes an average of 45 ​seconds, or μ=80 per hour​ (according to a negative exponential​ distribution).
 
a) The percentage of time the machine is used​ = 0.5
percent​ (round your response to the nearest whole​ number).
 
​b) The average length of the queue​ = 0.50
students​ (round your response to two decimal​ places).
 
​c) The average number of students in the system​ =  1
students​ (round your response to two decimal​ places).
 
​d) The average time spent waiting in the queue​ =  ???
enter your response here
minutes​ (round your response to two decimal​ places).
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