Question

The average age of 40 people in a group under two years is 11 years
When one person exits the group, the average age of the remaining members is 12 years. The
How old is the person who left?​

Answer 1

Answer:

Please check the sum

Step-by-step explanation:

Assuming that "age" is always a positive quantity. If one person exits the group, the average simply cannot fall.

Also, it is not clear what is meant by "under two years".

The sum could be that the average age of 40 people is 12 and when one person leaves, the average of the remaining 39 people falls to 11.