Question

if the mean of 25 observation is 27 and each observation is decreased by 7 find new mean

Answer 1

Hiii....☺

Here is your solution......☺

✳ Mean of 25 observation = 27

And now, each observation is decreased by 7

✳ By the property of mean we have,

=> If a constant real number 'a' is subtracted from each of the observation then the new mean will also get sunbracted by that constant number.

So, we have.....

Mean =27

New mean = ( 27 - 7) = 20

Thanks....☺

Hope this helps you.....