At the time of marriage the average age of a couple was 28 years and the age of husband was 30 years at the time of marriage. The age ratio of father and son’s age to the age ratio of Mother and Son’s age is 17 : 15. How many years after the marriage son was born?
1
1 year
2
2 years
3
3 years
4
4 years
5
None of the above