Waiting time in an express check out queue follow a normal distribution with mean of 210 seconds and standard deviation of 45 seconds. Use this information to answer the following questions.

13. What is the probability that the customer waits less than 120 seconds?	A 0.2667	B 0.2776	C 0.0228	D -0.5900
14. What is the probability that the customer waits more than 180 seconds?	A 0.7157	B 0.7486	C 0.2514	D 0.2546
15. In a sample of 10 customers, what is the probability that the customer waits for an average of less than 240 seconds?	A 0.9772	B 0.0179	C 0.0228	D 0.9821