Let us assume the average number of customers served per hour is five customers.What is the probability that the service exceeds 15 minutes for any customer?
A)29%
B)76%
C)45%
D)13%

Question

Quizplus · Accepted Answer

The average rate is 5 customers per hour, which means the average service time is 12 minutes per customer (60 minutes/5 customers). The probability that service time exceeds 15 minutes is the complement of the cumulative distribution function of an exponential distribution with a mean of 12 minutes, which is approximately 29%.

Let Us Assume the Average Number of Customers Served Per