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 is approximately

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