Question

The mean of 10number is 20 if 5 is subtracted from every number what will be the new mean

Answer 1

Answer:

If each number is subtracted or added by a number the mean also decreases or increases by same value.

Hence mean will become 15.

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Answer 2

Explanation:

Let the total num be x

so x\10=20

x=200

5 is subtracted frm 10 numbrs so total 50

200-50/10=new mean

=150/10

=15