A Single-Phase Waiting-Line System Meets the Assumptions of Constant Service

Multiple Choice

A single-phase waiting-line system meets the assumptions of constant service time or M/D/1.Units arrive at this system every 12 minutes on average.Service takes a constant 8 minutes.What is the average number in the system L_s in units?

A) 2.25
B) 2.5
C) 3.0
D) 1.33
E) 5.0