The ratio of the present age of (A + B), (B + C) and (C + A) is 5 ∶ 10 ∶ 9 if the average age of A, B, and C is 12 years then find the ratio of the ages of A, (B + C) and C after 12 years.
1
6 ∶ 12 ∶ 11
2
6 ∶ 18 ∶ 11
3
6 ∶ 11 ∶ 5
4
6 ∶ 13 ∶ 11
5
None of these