The average marks of a student in 10 papers are 80. If the highest and the lowest scores are not considered, the average is 81. Of his highest score is 92, find the lowest.
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Total marks = no. Of papers x averagearks
= 10 x 80 = 800
If lowest and highest marks are not considered, no. Of papers will be 8 only and the new average is 81 (given).
Then, total marks excluding the lowest and the highest is 8 x 81 = 648
Total of lowest and highest marks only
= 800 - 648 = 152.
Highest marks = 92 (given)
Lowest marks = 152 - 92 = 60
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