Question

Sal has earned the following 3 scores on his math test 15, 18, and 16 out of 20 points. He wants to make sure that his average test score is 17. What does he need to get on the last test?

Answer 1

He would need to score a 19 in order to get 17 as an average.

Answer 2

He needs to score a 19

Explanation:

First, I found the mean of the three test scores. The mean was below 17 so I knew he needed a grade higher than the ones he already has. So I went up from 18. So my first equation was 15+18+16+19=68. then I divided by 4 which gives you a mean of 17. (Mean=average)