Question

(33-36) Suppose that you work for Chick-fil-A and your manager has asked you to look at the wait times in the Drive-Thru.  Supposing that wait times are normally distributed with a mean wait time of 30 seconds and a population standard deviation of 5 seconds (3 pts each):

30. 33. What is the probability that a randomly selected person will wait more than 42 seconds?
    1. .9918
    2. .0082
    3. .9772
    4. .0228
    5. .0013

30. 34. What is the probability that a randomly selected person will wait 33 seconds or more?
    1. .7881
    2. .2743
    3. .2643
    4. .7257
    5. .2119

32. 35. What is the probability that a randomly selected person will wait between 20 and 30 seconds?
    1. .4580
    2. .3830
    3. .4772
    4. .0228
    5. .9772

33. 36. What is the wait time such that 11.9% (.1190) of people will wait that time or longer to get their Chick-fil-A drive thru meal?
    1. 41.3 seconds
    2. 24.1 seconds
    3. 18.7 seconds
    4. 34.0 seconds
    5. 35.9 seconds

Answers are in bold, need help with how to solve

Answer 1