Exhibit 13.1 The Following Questions Are Based on the Output Below

Multiple Choice

Exhibit 13.1
The following questions are based on the output below.
A store currently operates its service system with 1 operator. Arrivals follow a Poisson distribution and service times are exponentially distributed. The following spreadsheet has been developed for the system.
-If a company adds an additional identical server to its M/M/1 system, making an M/M/2 system, what happens to a customer's average service time?

A) increases
B) decreases
C) it is unchanged
D) depends on the arrival rate