The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What...

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The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What...

The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What is the probability that the bulb will last more than 1,200 hours?

A .3012

B .4345

C .3679

D .6988

math Statistics-And-Probability

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Answer 1

Answer #1

Solution :

mean = 1000 hours

P(X > 1200) = e ^{-1200 / 1000} = 0.3012

Probability = 0.3012

A)

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Answer 2

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