An average of 300 customers per hour arrive at a hugebranch of bank 2. It takes an average of 2 minutes to serveeach customer. It costs $10 per hour to keep open a tellerwindow, and the bank estimates that it will lose $50 infuture profits for each hour that a customer waits in line.How many teller windows should bank 2 open?

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section12.5: Analytic Steady-state Queueing Models
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An average of 300 customers per hour arrive at a huge
branch of bank 2. It takes an average of 2 minutes to serve
each customer. It costs $10 per hour to keep open a teller
window, and the bank estimates that it will lose $50 in
future profits for each hour that a customer waits in line.
How many teller windows should bank 2 open?

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