As a student, you are required to study the operation of the Coastal Java during a typical weekday. You arrive at 8 am just as Coastal Java is opening, and you diligently record information over the next hour. According to the manager, Coastal Java 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 questions:

38. What was the average number of customers in line during the period you observed?

Group of answer choices

1.0

4.167

25

0.1667

3.67

39. What was the average waiting time for a customer in line during this period?

Group of answer choices

4.167

0.1667

25

3.67

1.0

40. What is the probability of having 2 customers in the system?

Group of answer choices

0

25%

11.6%

15%

5%