Question 72

The average marks in English of a class of 24 students is 56. If the marks of three students were misread as 44, 45 and 61 in lieu of the actual marks 48, 59 and 67 respectively, then what would be the correct average?

Solution

Total marks = 24 x 56 = 1344
Sum of actual marks = 1344 - (44 + 45 + 61) + (48 + 59 + 67) = 1368
Actual Average = $$\frac{1368}{24}$$ = 57

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