A Multiple-Channel Queuing System with a Poisson Arrival Rate and Exponential

Multiple Choice

A multiple-channel queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of four customers per hour and an average service time of 18 minutes per customer. The minimum number of servers required to avoid an overloaded system is

A) 1.
B) 2.
C) 3.
D) 4.
E) 5.