Question: In a single-channel, single-phase queuing (waiting line) system, it is reasonable to assume Poisson arrivals with average arrival rate of 10 customers per hour. It

In a single-channel, single-phase queuing (waiting line) system, it is reasonable to assume Poisson arrivals with average arrival rate of 10 customers per hour. It is also reasonable to assume Negative Exponential service time with average service rate of 12 customers per hour. Based on these information, the average time (in hours) a customer spends in the system is

	a.	0.2
	b.	0.3
	c.	0.5
	d.	Not enough information given to answer this question

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