As an interested student, you have volunteered to study the operation of the Sunbucks during a typical weekday. You arrive at 8 am just as Sunbucks is opening, and you diligently record information over the next hour. According to the manager, Sunbucks should be able to serve an average of 1 customer every 2 minutes and during the period you were collecting data 25 customers arrived to make a purchase. Based on your data, answer the following:
a. What was the average number of customers in line during the period you observed?
b. What was the average waiting time for a customer in line during this period?
c. What is the probability of having 2 customers in the system?
