Problem 42 Statistics Grade In a large section of a statisti

Problem #42 Statistics Grade:

In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule:

The top 10% receive A\'s.

The next 20% receive B\'s.

The middle 40% receive C\'s.

The next 20% received D\'s.

The bottom 10% receive F\'s.

Find the lowest score on the final exam that would qualify a student for an A, a B, a C, and a D.

Solution

We have to find the lowest score on the final exam that would qualify a student for an A, a B, a C, and a D.

See that only F