A Single-Server Waiting Line System Has an Arrival Pattern Characterized

Multiple Choice

A single-server waiting line system has an arrival pattern characterized by a Poisson distribution with 3 customers per hour. The average service time is 12 minutes. The service times are distributed according to the negative exponential distribution.
-The probability that the system is idle is:

A) 0
B) .20
C) .40
D) .60