The mean weight of 8 numbers is 15, if each number is multiplied by 2, what will be the new mean
Let, 8 numbers be: x1, x2, x3, .......,x8
Now, mean of the above numbers
When number is multiplied by 2, then new numbers are: 2x1, 2x2, 2x3, ......., 2x8
Therefore, new mean
Hence, the new mean of 8 numbers will also be doubled i.e., become 30.