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Anna got these grades in different subjects, 91+94+85+83+84+85+92+90+82+ her 10th grade..... what is her 10th grade if her average is 87.25?
The answer is 86.5.
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1 solution
(91+94+85+83+84+85+92+90+82+ x)/10 = 87.25
or, 786 + x = 872.5
or, x = 872.5 - 786
or, x = 86.5