Question

The mean of a set of 8 numbers is 3.5. If the number 8 is added to the set, then

what is the new mean

Answer 1

The new mean of the set of 9 numbers after adding 8 to the set can be calculated as follows:

1. Find the sum of the original set of 8 numbers:

Sum of original set = 8 x 3.5 = 28

2. Add 8 to the sum of the original set:

New sum = 28 + 8 = 36

3. Divide the new sum by the new number of elements in the set (9):

New mean = 36 / 9 = 4

Therefore, the new mean of the set of 9 numbers is 4.