Question

Deandre has scored 88, 93, 95, and 86 on his previous four tests. What score does he need on his next test so that his average (mean) is 87? I​

Answer 1

73

Explanation:

We can find the mean by dividing the sum of all the data points by the total number of points we have.

If we let s represent the score Deandre needs on his next test so that his average test score is 87, we can use the following equation to find the score he needs:

`(88+93+95+86+s)/5=87\\(367+s)/5=87\\367+s=435\\s=73`