M1
1 mark · average 0.9 13% scored 0
The question in our own words · page 20
A driver's trip to work takes \(T\) minutes, a continuous random variable with density \(f(t)=\tfrac{1}{1215000}(t-29)(59-t)^3\) for \(29\le t\le59\) (and \(0\) elsewhere). Find the mean trip time in minutes.
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