The average age of a husband and wife was 23 years when they were married 5 years ago. The average age of the husband , the wife and a child who was born during the interval , is 20 years now. How old is the child now ?

The average age of a husband and a wife was 27 years when the child was born. The average age of the husband, the wife and a new-born child is 21 years now. The present age of the child is :

The average of the age of a husband and wife, five years ago was 25 years. The average of the present age of husband, wife and a child born during the time is 21 years. Determine the present age of the child.

The avetage age of a husband and a wife, who were married 4 years ago, was 25 years at the time of their marriage. The average age of the family consisting of husband, wife and a child born during that interval is 20 years today. The age of the child is

The average age of husband, wife and child 7 years ago was 42 years and that of wife and child 9 years ago was 36 years. The presentage of the husband is: