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. The average length of the queue L_q is approximately

A) 0.67
B) 2.5
C) 4.5
D) 5.0
E) 7.5