The mean of 5 numbers is 18. If one number is excluded, their mean is 16. Find the excluded number.
The mean of 5 numbers is 18
Then, the sum of 5 numbers = 5 * 18
= 90
If the one number is excluded
Then, the mean of 4 numbers = 16
Therefore, sum of 4 numbers = 4 * 16
= 64
Excluded number = 90 – 64
= 26