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The random variable that models the number of years it takes for a cell phone to fail, follows an exponential distribution with a mean of
The random variable that models the number of years it takes for a cell phone to fail, follows an exponential distribution with a mean of five. Find the probability that a cell phone will work well at the end of eight years.
(round your result to a decimal)
Select one:
a. 20%
b. 80%
c. 70%
d. 30%
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