By means of extensive testing, a manufacturer has determined that its Super Sucker Vacuum Cleaner models have
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By means of extensive testing, a manufacturer has determined that its Super Sucker Vacuum Cleaner models have an expected life that is exponential, with a mean of four years. Find the probability that one of these cleaners will have a life that ends
a. after the initial four years of service.
b. before four years of service are completed.
c. not before six years of service. LO.1
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