An Analysis of the Grades on the First Test in History

Multiple Choice

An analysis of the grades on the first test in History 101 revealed that they approximate a normal curve with a mean of 75 and a standard deviation of 8. The instructor wants to award the grade of A to the upper 10 percent of the test grades. What is the dividing point between an A and a B grade?

A) 80
B) 85
C) 90
D) 95
E) None of the choices are correct