The average age of 8 boys is 14 years. If 2 more boys of age 15 and 17 years join, their average will become
1
14.4 years
2
13 years
3
21 years
4
19 years
5
22 years
The average age of 8 boys is 14 years. If 2 more boys of age 15 and 17 years join, their average will become