# Question

The mileage (in thousands of miles) that car owners get with a certain kind of radial tire is a random variable having an exponential distribution with θ = 40. Find the probabilities that one of these tires will last

(a) At least 20,000 miles;

(b) At most 30,000 miles.

(a) At least 20,000 miles;

(b) At most 30,000 miles.

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