**Hard Average Methods shortcut tricks**Advertisement

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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?

- 60
- 62
- 57
- 59

Show Answer Show How to Solve Open Rough Workspace

**Answer:**Option (D)

**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

- Average Methods Example 1
- Average Methods Example 2
- Average Methods Example 3
- Average Methods Example 4
- Average Methods Example 5
- Average Methods Example 6
- << Go back to Average main page

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