a=6 b=2

3- Consider M/M/3//50 queuing system for the bank example discussed in the class where - Avg. arrival rate =2 patient every hour - Avg. service time =2(a+b) mins if a>0; otherwise Avg. service time =10+b mins and calculate (Point: 30): a. probability that all servers are idle? b. probability that exactly two servers are idle? c. probability that there are (2a+b+5) customers in the bank