Question

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

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Answer 1

Mean of 20 numbers=8

hence,sum of 20 numbers=20×8=160

since,4 is added to every number...

hence, new sum=160+80=240.

now new mean=240/20

12

hence,new mean=12

please mark as brainliest...

Answer 2

Answer:12

Step-by-step explanation:

Mean=Sum/No. Of observation

8=Sum/20

Sum=20*8

Sum=160

A.T.Q

4 is added to each number it means this time the sum will be (20*4) more.

New sum=160*(20*4)

=160*80

=240

New mean=Sum/No. Of observation

=240/20

=12