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The total number of thousands of miles that a used car can be driven before it would need to be junked is modelled using an

The total number of thousands of miles that a used car can be driven before it would need to

be junked is modelled using an exponential random variable with parameter 1/15. Smith has a

used car that he claims has been driven only 5, 000 miles. If Jones purchases the car, what is the

probability that she would get at least 30, 000 additional miles out of it?

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