What proportion of the time will all buses be operational


Response to the following problem:

Steve Jackson is responsible for maintaining a fleet of 8 school buses. On the average, a bus will need repair work every 20 days. The average time required to perform this work is one day. Both the time between needed repairs and the time to perform repairs are expected to follow exponential distributions.

a. What is the average amount of time a bus will be out of service for a needed repair?

b. On the average, how many buses will be waiting for repair at any given time?

c. What proportion of the time will all buses be operational?

 

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Applied Statistics: What proportion of the time will all buses be operational
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