Question

the mean of 20 numbers is 8. if 4 is added to each number, find out the new mean

Answer 1

Answer:

24

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 20.

Then, their sum will be 20 x 8.

Sum = 160

Now, if 4 is added to each number the new sum will be :-                           160 + ( 8 x 4 )

= 160 + 32

= 192

Now. the new mean will be 192/8 ( Since, Mean = Sum of Quantities/ Number of Quantities. )

Therefore, the new mean will be 24.

Hope it Helps!