The exam scores for 100 students when 40 students got an F, 25 students got a D, and20 students got a C.

a. There would be one peak on the far left (F's).

b. The distribution would be right-skewed because the scores trail off to the right.

c. The variation is large

a. There would be one peak on the far left (F's).

Step-by-step explanation:

There are 100 students:

40 got an F

25 got a D

20 got a C.

100 - (40+25+20) = 15 got an A or a B.

Most of these students got bad grades, so the variation is not very large.

The distribution goes from the left (the lower grades), to the right. The lower grades had a higher frequency, so the distribution is left-skewed.

The most common grade is F, so there is one peak on the far left.

So the correct answer is:

a. There would be one peak on the far left (F's).