Question

The mean of 15 numbers is 8.if 2 is added to every number what is the new mean

Answer 1

hope this will help you

Answer 2

Solution :-

Mean = 8

Total number of observations = 15

Mean = Sum of observations/number of observations

⇒ 8 = Sum of observations/15

⇒ Sum of observation = 8*15 = 120

Now, 2 is added to every number.

Then 2*15 = 30 is added,

then the new sum = 120 + 30

= 150

New mean = New sum of observation/number of observation

⇒ 150/15

New mean = 10

Answer.