Practicing Success
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: |
94 95 96 97 |
96 |
Difference in marks due to wrong entry = 86 - 68 = 18 Average Diminished by = \(\frac{18}{9}\) = 2 So , Correct average is = 98 - 2 = 96 |