The cycle time for trucks hauling concrete to a highway construction

QUESTION

The cycle time for trucks hauling concrete to a highway construction site is uniformly distributed over theinterval from 50 to 70 minutes.a. Find the expected value and the variance for these cycle times.b. How many trucks should you expect to have to schedule for this job so that a truckload of concrete can be dumped at the site every 15 minutes.

 

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