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# Hard Average Methods shortcut tricks

## Hard Average Methods shortcut tricks

Example #1
The average marks in Mathematics of 28 students is 58. If the marks of students were wrongly read as 36, 46, 57 of the existing marks 42, 59, 66 respectively, then find the correct average?

1. 60
2. 62
3. 57
4. 59

Show Answer Show How to Solve Open Rough Workspace

How to Solve
Present total marks of 28 students is ( 58 x 28 ) = 1624
Total marks with correct marks is ( 1624 + (( 42 + 59 + 66 )-( 36 + 46 + 57 )))
= 1624 + 28
= 1652
So, the new average marks will be ( 1652 / 28 ) = 59.
Rough Workspace

### Few Examples of Average Shortcut Tricks

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