Find probability that one of tires will last more than miles

Reference no: EM13149168

The lifetime of automobile tires of a certain brand are found to follow an exponential distribution with mean 30 (in thousands of miles). Find the probability that one of these tires will last

a) more than 30,000 miles
b) more than 30,000 miles given that it already has gone 15,000 miles.

Reference no: EM13149168

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