The rate of service is exponential and the service rate is 12 customers served per hour. The arrival of customers is in a Poisson distribution at the rate of 30 per hour. There are 3 servers and the average waiting time is 7 minutes. How would I go about doing this? Could really use some help!
Edit - I've also calculated the probability that an arriving customer has to wait as 0.7. Not sure how to calculate the probability regarding waiting time though.