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San Diego State University Operations And Supply Chain Management Assignment Help - Mean


Question - Sparagowski & Associates conducted a study of service times at the drive-up window of fast-food
restaurants. The average time between placing an order and receiving the order at McDonald’s
restaurants was 2.78 minutes (The Cincinnati Enquirer, July 9, 2000). W aiting times, such as these,
frequently follow an exponential distribution.
a. W hat is the probability that a customer’s service time is less than 2 minutes?
b. W hat is the probability that a customer’s service time is more than 5 minutes?
c. What is the probability that a customer’s service time is more than 2.78 minutes?

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