Question

The mean of 20 numbers is 12. If each number has increased by 3 , find the new mean​

Answer 1

total identity =20

now if everyone is increased my 3

then simply mean also increase my 3

new mean = 15

Answer 2

Step-by-step explanation:

The mean of 12 numbers is 20. So if each number is multiplied by, the new mean will be 20*3 = 60. ... 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.