Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times). Each server can handle 0.4 customers per minute (exponential service times).
If there are 4 servers, what is the probability of three or fewer customers in the system?
A) 0.19
B) 0.23
C) 0.63
D) 0.68
E) 0.79

Question

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The Answer of Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times). Each server can handle 0.4 customers per minute (exponential service times).
If there are 4 servers, what is the probability of three or fewer customers in the system?
A) 0.19
B) 0.23
C) 0.63
D) 0.68
E) 0.79

Customers Arrive at a Video Rental Desk at the Rate