The average marks in English subject of a class of 24 students is 56. If the marks of three students were misread as 44, 45 and 61 of the actual marks 48, 59 and 67 respectively, then what would be the correct average?
Solution
Given,
Sum of the marks misread = 44+45+61 = 150
Actual marks of the students = 48, 59 and 67
Actual marks sum = 48+59+67 = 174
Difference = 174-150 = 24
Cporrect average = 56+$$\ \frac{\ 24}{24}$$
= 57
D is the correct answer.
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