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Roman55 [17]
3 years ago
13

Questio

Mathematics
1 answer:
maxonik [38]3 years ago
6 0

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.

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