Question

The mean of six numbers is 25. If one number is cxcluded, their mean is 27. Find the excluded number

Answer 1

the mean of 6 number is 25

=> The total of 6 numbers is 25x6=150

If one number is excluded, the mean of 5 number is27

=> The total of 5 numbers is 27x5=135

=> The excluded number is 150-135=15