Suppose That, for a Certain Exam, a Teacher Grades on a Curve

Multiple Choice

Suppose that, for a certain exam, a teacher grades on a curve according to the number line shown below. It is known that the grades follow a normal distribution with a mean of 70 and a standard deviation of 7. There are 45 students in the class. How many students should receive an A? Please, round your answer to the nearest integer.

A) 12 students
B) 7 students
C) 1 student
D) 22 students
E) 6 students