Question

Questio

Answer 1

Answer:

He needs 92 on his last test.

Step-by-step explanation:

Mean score:

The mean is the sum of all scores divided by the number of tests.

In this question:

Scores of 85, 89, 85, 89 and x(the last one).

5 tests.

We want a mean of 88. So we find x for a mean of 88.

$\frac{85 + 89 + 85 + 89 + x}{5} = 88$

$348 + x = 440$

$x = 440 - 348 = 92$

He needs 92 on his last test.