The neighborhood kids set up an outdoor lemonade stand in Maryland in February. They are disappointed to find that their average customer arrival rate is only 1 per hour even though they are capable of serving 1 customer every 1.5 minutes.
1. What is the average number of customers waiting in the queue?
a. 0.026
b. 0.0006
c. 0.038
d. 1.538
e. 1
2. What is the average customer waiting time in the queue?
a. 0.0 seconds
b. 2.3 seconds
c. 40.0 seconds
d. 60.0 seconds
e. 90.0 seconds
3. What is the probability that the kids will have no customers in the system?
a. 0.0%
b. 2.5%
c. 50.0%
d. 97.5%
e. 100.0%