Question: The distance between consecutive flaws on a roll of sheet aluminum is exponentially distributed with mean distance 3 m. Let X be the distance, in

The distance between consecutive flaws on a roll of sheet aluminum is exponentially distributed with mean distance 3 m. Let X be the distance, in meters, between flaws.

a. What is the mean number of flaws per meter?

b. What is the probability that a 5 m length of aluminum contains exactly two flaws?

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