Question: At a certain bus stop the time between buses is a random variable X with the density function f (x) = 6x(10 - x)/1000, 0

At a certain bus stop the time between buses is a random variable X with the density function f (x) = 6x(10 - x)/1000, 0 ≤ x ≤ 10. Find the average time between buses.

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