Question

The mean of 10 numbers is 7. if each number is multiplied by 12 ,then the mean of new set of number is​

Answer 1

Answer:

Correct Answer:- 84.

Step-by-step explanation:

Total of 10 numbers =10×7=70

If each number is multiplied by 12

New Total =70×12

∴ New mean = 10

"70×12" = 84.

Hence, Verified.....

Answer 2

Answer:

The mean of new set of number is 84

Step-by-step explanation:

Given the mean of 10 numbers = 7

   each number is multiplied with 12

 in a arithmetic mean, if each element is multiplied by a value 'S'

 then mean of the new set of number = actual mean×S  

 ∴ the mean of the new set of number

                    = actual mean × number which is multiplied

                    = 7 × 12 = 84