Question:
The mean weight of 8 numbers is 15. If each number is multiplied by 2, what will be the new mean?
Solution:
We have,
The mean weight of 8 numbers is 15
Then, the sum of 8 numbers = 8 × 15 = 120
If each number is multiplied by 2
Then, new mean = 120 × 2 = 240
∴ new mean = 240/8 = 30.