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Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes
(Collina’s website, February 27, 2008). Assume that the time required for a carryout
order to be ready for customer pickup has an exponential distribution with a mean of 25
minutes.
a. What is the probability than a carryout order will be ready within 20 minutes?
b. If a customer arrives 30 minutes after placing an order, what is the probability that the
order will not be ready?
c. A particular customer lives 15 minutes from Collina’s Italian Café. If the customer
places a telephone order at 5:20 P.M., what is the probability that the customer can drive
to the café, pick up the order, and return home by 6:00
Solution

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Collina’s Italian Café in Houston, Texas, advertises that carryout o.pdf

  • 1. Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a mean of 25 minutes. a. What is the probability than a carryout order will be ready within 20 minutes? b. If a customer arrives 30 minutes after placing an order, what is the probability that the order will not be ready? c. A particular customer lives 15 minutes from Collina’s Italian Café. If the customer places a telephone order at 5:20 P.M., what is the probability that the customer can drive to the café, pick up the order, and return home by 6:00 Solution