The manager of a fast-food restaurant determines that the average time that her customers wait for service
Question:
(a) Find the probability that a customer has to wait for more than 4 minutes.
(b) Find the probability that a customer is served within the first 2 minutes.
(c) The manager wants to advertise that anybody who isn’t served within a certain number of minutes gets a free hamburger. But she doesn’t want to give away free hamburgers to more than 2% of her customers. What should the advertisement say?
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We use an exponential density function with 25 min a PX 4 ft dt lim f25e125 dt ...View the full answer
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