Question

The natural numbers 2, 5, x, x + 2, 20 and 30 are in ascending order such that the median of these numbers is 9. The mean of these numbers is

Answer 1

Answer:

Find the mean of the set {2,5,5,6,8,8,9,11} . There are 8 numbers in the set. Add them all, and then divide by 8 . 2 + 5 + 5 + 6 + 8 + 8 + 9 + 118=548=6.75. So, the mean is 6.75 .

Answer 2

Answer:

Find the mean of the set {2,5,5,6,8,8,9,11} . There are 8 numbers in the set. Add them all, and then divide by 8 . 2 + 5 + 5 + 6 + 8 + 8 + 9 + 118=548=6.75.