Polina's math scores are shown in the table.

Polina's Math Scores

Math Scores

72

65

75

88

90

What is the mean absolute deviation of her math scores?

5.4

6.4

7.8

8.8

First step is to add the given data and find the average. (72+65+75+88+90) / 5=78

Then, subtract the average from each of the data and get the absolute values.

72-78 = 6

65-78 = 13

75-78 = 3

88-78 = 10

90-78 = 12

Next, add these values and get their average as well.

(6+13+3+10+12) / 5=8.8

8.8 is the final answer.