Posted by **felicia** on Saturday, June 2, 2012 at 8:45pm.

Tim wants his mean (average) quiz score in history class to be 90. His first 3 quiz scores were 86, 92, and 94. What score should he make on the 4th quiz in order to have a mean (average) quiz score of exactly 90?

I really need the answer ! PLZ PLZ PLZ ! cant figure it outtt !!!! -___-

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