The times to process orders at the service counter of a pharmacy are exponentially

Chapter 7, Problem 7.87

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QUESTION:

The times to process orders at the service counter of a pharmacy are exponentially distributed with mean 10 minutes. If 100 customers visit the counter in a 2-day period, what is the probability that at least half of them need to wait more than 10 minutes?

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QUESTION:

The times to process orders at the service counter of a pharmacy are exponentially distributed with mean 10 minutes. If 100 customers visit the counter in a 2-day period, what is the probability that at least half of them need to wait more than 10 minutes?

ANSWER:

Step 1 of 3

Given:

Formula probability exponential distribution:

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