Question

A student had taken six tests and received scores of 88, 73, 81, 83, 79, 94. What does he have to score in his next test to get a mean score of 83?

Answer 1

The student would have to get an `82` on the next test

Explanation:

Let `x` be the test score the student has to get.

The total number of test is `7`

calculate the mean and solve for `x`

`(88+73+81+83+79+95+x)/7=83`

Combine like terms

`(499+x)/7=83`

Multiply both sides by `7`

`499+x=581`

Subtract `499` from both sides

`x=82`