Question 81

The average marks of 40 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37. What is the value of correct average?

Solution

Avrg marks of 40 students = 25

total marks = 25*40 = 1000

But the marks of one student had been wrongly entered as 73 instead of 37

now, total marks = 1000-73+37 = 964

new average = 964/40 = 24.1

So the answer is option B.

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