Question 149837
a student earned 87 81 88 on first 3 of 4 test if she wants an average of 87 what score must she earn on 4th test my compass study guide says 92 what sequence is used to find 92
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An average of 87 on 4 tests means a total of 87*4 on all 4 tests, or 348 points.
She now has 87+81+88 = 256, so she needs 92 on the 4th test.  92 = 348-256.