Bobby the barber is thinking about advertising in the local


Bobby the Barber is thinking about advertising in the local newspaper since he is idle 50 percent of the time. Currently, customers arrive on average every 50 minutes.

What does the arrival rate need to be for Bobby to be busy 90 percent of the time? (Round your intermediate calculations to 3 decimal places and final answer to 2 decimal places.)

Arrival rate             customers per hour

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