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A math student scored 75, 70, 85, 90, 100 on the first five tests he took . After he took his sixth math test, the average is now 85. What did he score on the sixth test?
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A math student scored 75, 70, 85, 90, 100 on the first five tests he took . After he took his sixth math test, the average is now 85. What did he score on the sixth test?

User M Dunbavan
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To figure this out, you have to find the mean of the data set and solve for x.

(75 + 70 + 85 + 90 + 100 + x) / 6 = 85

The answer would be 90
User Mattz
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