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# When 10 is subtracted from all the observations, the mean is reduced to 60% of its value. If 5 is added to all the observations, then the mean will be

- 25
- 30
- 60
- 65

## The correct answer is: 30

### To find the value of new mean.

If 10 is subtracted from all the observations, then mean will also get reduced by value of 10.

Hence, (mean−10)=3/5 x mean

⇒mean =25

Also 5 is added to all the observations, then the mean will be mean+5.

Thus, the required mean =25+5=30

Hence, the new mean is 30.

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