Workmen arrive at a mine workshop to receive tools for maintenance. The inter-arrival time of workmen at the service counter is exponentially distributed with an average time of 10 min. The service time at the counter is also distributed exponentially with a mean time of 6 min. The average time spent by a workman waiting for his turn to be served in min is
A. 9
B. 12
C. 15
D. 18
Answer: Option A
Related Questions on Mine System Engineering
A. Unique optimal solution
B. Multiple optimal solution
C. Unbounded solution
D. Infeasible solution
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