Question

The mean of 8 nos. Is 25. If 5 is subtracted from each, what will be the new mean?

Answer 1

the sum of 8 nos.=25×8=200

5 is subtracted from each
total value subtracted from the sum = 200- 8×5
=200-40
=160

New mean = 160/8
=20

Answer 2

Answer:

20

Step-by-step explanation:

Mean : The value obtained after dividing the sum of quantities by the number of quantities is known as the mean. It is also known as an average.

Also, Mean = Sum of Quantities/ Number of Quantities.

Given, the mean of 8 numbers is 25.

Then. their sum will be 25 x 8.

Sum = 200

Now, if 5 is subtracted from each number, then the new sum will be :-     200 - (8 x 5)

= 200 - 40

= 160

Now, the new mean will be 160/8 ( Since, Mean = Sum of Quantities/ Number of Quantities. )

Therefore, the new mean is 20.