A McDonald restaurant in Ithaca, New York, has a drive-through window to better serve customers. The following tables provide information about the time between arrivals and the service times required at the window on a particularly busy day of the week.

Time Between Arrivals (in minutes)	Probability	Interval of Random Numbers
1	0.1	01-10
2	0.3	11-40
3	0.4	41-80
4	0.2	81-00
Service Time (in minutes)	Probability	Interval of Random Numbers
1	0.2	01-20
2	0.4	21-60
3	0.3	61-90
4	0.1	91-00

The first random number generated for arrivals is used to tell when the first customer arrives after opening. The following two questions are based on the information presented in the above table.

19) If the store opens at 8:00 a.m., and random numbers are used to generate arrivals, how many customers will arrive before 8:15 a.m. given that the first ten random numbers are 13, 07, 47, 41, 50, 72, 89, 33, 02, and 69?

A) 4 B) 5 C) 6 D) 7 E) None of the above.

20) The store opens at 8:00 a.m., and random numbers are used to generate arrivals and service times. The first two random numbers for arrivals are 55 and 12. The first two random numbers for service times are 75 and 07. At what time does the second customer finish transacting business?

A) 8:06 a.m. B) 8:07 a.m. C) 8:08 a.m. D) 8:09 a.m. E) None of the above.