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The average of Manny's three tests is an 84. What must he get on a 4th test to raise his averageto a 87?
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The average of Manny's three tests is an 84. What must he get on a 4th test to raise his averageto a 87?

User Wnm
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90 because 84 plus 90 divided by 2 is 87.

User Joe Seifi
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