General Studies · Industrial Engineering and Operations Research
Customers arrive at a single-server barber shop according to a Poisson process with a mean inter-arrival time of 20 minutes. Customers spend an average of 15 minutes in the barber's chair, with service time following an exponential distribution. Determine how much time (in minutes) a customer can expect to wait in the queue before their turn.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 130 minutes
- 215 minutes
- 345 minutes✓
- 420 minutes
Correct answer
45 minutes
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