Professor Elderman Has Given the Same Multiple-Choice Final Exam in His

Multiple Choice

Professor Elderman has given the same multiple-choice final exam in his Principles of Microeconomics class for many years. After examining his records from the past 10 years, he finds that the scores have a mean of 76 and a standard deviation of 12. Professor Elderman offers his class of 36 a pizza party if the class average is above 80. What is the probability that he will have to deliver on his promise?

A) 0.0228
B) 0.3707
C) 0.6293
D) 0.9772