The average of 18 numbers is 37.5. If six numbers of average x are added to them, then the average of all the numbers increases by one. The value of x is:

Solution (By Examveda Team)

After added 6 numbers, total numbers will be = 24
Now, the average of 24 numbers = 38.5
Increase '1' in every numbers
So, total increasation = 24
The average of 6 numbers (x) = 37.5 + $$\frac{{24}}{6}$$
x = 37.5 + 4
x = 41.5