The ratio of the present age of father to elder son is 4: 1 and the ratio of the present age of mother to younger son is 6: 1. The present age of a father is 4 years more than the present age of a mother. The total present age of both sons is 16 and the total present age of the mother and father.
1
76
2
78
3
80
4
74
5
72