This question has 2 parts: The average test score on a statistics test was 84.2. Assume the class had a normal distribution and the standard deviation for the class was 1.8. A). What is the...

 This question has 2 parts:

The average test score on a statistics test was  84.2.   Assume the class had a normal distribution and the standard deviation for the class was  1.8.

A). What is the probability that a randomly selected student had a score greater than 86?

B).  If the class had  30 students in it, what is the probability that the sample mean is greater than  83?