In a single-server queuing system, if 12 customers arrive per hour with Poisson distribution and the customer service time is 2 minutes each with a negative exponential distribution. The average time a customer can expect to wait in line is: 1) 1.33 minutes. 2) 4.5 minutes. 3) Undecided.

A: Circle  To find m∠CEB

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A: Solution: a. From the given information, n=26 and π=0.34.