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. what is the probability that a class of 15 students will have a class average greater than 70 on professor elderman’s final exam? you answered 0.6915 correct answer cannot be determined. 0.0262 0.9738