The average weight of a group of 12 children is 66 kg. If 2 children, X and Y, join the group in place of A and B, the new average weight becomes 65 kg. Weight of A = weight of B and weight of X = weight of Y. Another child C is added to the group, and the new average weight remains 65 kg. Weight of C = Weight of X. Find the weight of A.
1
67 kg
2
69 kg
3
71 kg
4
72 kg