Average age of 9 members = 29 years; Excess age of 2 new members = (40 - 29) × 2 = 22 years
Therefore, Increase in the average age on inclusion of 2 new members = 22112211 = 2 years
Therefore, Average age of 11 members = 29 + 2 = 31 years
Average age of 9 members of a club is 29 years. If 2 more persons with the average age of 40 years have become the members of the club, find average age of all the 11 members.
Options:
1. 15
2. 31
3. 77
4. 99
5. 22