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36. A single server queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 9 customers per hour

36.

A single server queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 9 customers per hour and an average service rate of 18 customers per hour. What is the probability that this system will contain 2 or more customers?

a.

0.875

b.

0.5

c.

0.75

d.

0.25

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