In the National Board Examinations, the scores are scaled so that among all medical students taking the exam nationwide, the scores are approximately normally distributed with a mean of 500 and a standard deviation of 100.

A. What percentage of the students will have scores exceeding 700?

B. What is the probability that a randomly selected student will have a score greater than 700?

C. What percentage of students score between 400 and 700?

D. What score is exceeded by 10 percent of the students? ("Curving" a test)

E. What is the probability that a randomly selected individual scored less than 400?