The assumption of exponentially distributed service times indicates that a. service time increase at an exponential rate as the
waiting line grows. b. 37% of the service times are less than the mean service time. c. 63% of the service times are less than the mean service time. d. 50% of the service times are less than the mean service time.
Exponential distribution is large class of probability that includes its member .It also include normal distribution, binomial , gamma , Poisson and many other distribution as well.
Example
It is concerned with the amount of time until any event occur.For example length , in minutes and long distance telephone,
so from given statement it is about time service so option c 63% of the service are less than the mean service is true about it
