A waiting-line system that meets the assumptions of M/M/S has ? = 5, ? = 4, and M = 2. For these values, Po is approximately 0.23077, and Ls is approximately 2.05128. What is the average time a unit spends in this system?
A) approximately 0.1603
B) approximately 0.2083
C) approximately 0.4103
D) approximately 0.8013
E) Cannot be calculated because ? is larger than ?.
C
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