Q:

When the average age of husband, wife and their son was 42 years, the son got married and a child was born just one year after marriage. When the child turned to be 5 years, the average age of the family becomes 36 years. What was the age of daughter-in-law at the time of marriage?

• 1
  24 year
• 2
  28 year
• 3
  30 year
• 4
  25 year