Question

If the mean of 12 numbers is 20 then their algebraic data is

Answer 1

Answer:

The mean of 12 numbers is 20.

So if each number is multiplied by, the new mean will be 20*3 = 60. Answer.

Proof: Sum of the 12 numbers - 12*20 = 240.

So the sum of the 12 numbers when multiplied by 3 = 240*3 = 720.

And the new mean of the 12 numbers = 720/12 = 60. Proved.