1. A single server queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 9 customers per hour and an average service rate of 16 customers per hour. What is the probability that this system will contain 5 or more customers?

a. 0.05631

b. 0.8999

c. 0.9683

d. 0.9437

2. Customers arrive at a video rental desk at the rate of 13 per minute(Poisson).Each server can handle 4.334 customers per minute(Poisson). There are 5 servers in the system. What is the probability of 8 customers in the system?

a. 0.059

b. 0.02

c. 0.047

d. 0.035

e. 0.764