enrique has a 91, 87 and 95 for his grades. his mean grade for the year must be a 93. what is the lowest whole number grade he can get for the 4th quarter?

Enrique has a 91, 87, and 95 for his grades for the first 3 quarters. His mean grade for the year must be a 93. what is the lowest whole number grade he can get for the 4th quarter
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1 Answer

If his fourth quarter grade is X then (91+87+95+X)/4=93 to give him a mean of 93 for the whole year.

So, 273+X=4*93=372 and X=372-273=99. His 4th quarter grade must be 99.

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