statistics
posted by MM .
A large group of students has taken a college entrance exam. The scores on the exam are such that the mean = 52 and the standard deviation = 11
Find the probability that a student, selected at random, earned a score lower than 63.

Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.