The average marks obtained by a student in 9 subjects is 98. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is:
Answer & explanation
Correct answer: option 3
Difference in marks due to wrong entry = 86 - 68 = 18
Average Diminished by = \(\frac{18}{9}\) = 2
So , Correct average is = 98 - 2 = 96