Question 12-15 ? The arrival rate is 30 ? The service rate is 35 ? There is 1 server a) The average number of trucks in the unloading system is 6 b) Average time per truck in the system is 0.2 or 12 minutes c) The utilization rate of the bin area is 0.8571 d) Probability that there are more than 3 trucks is 0.46 e) Total daily costs are $126.