IBPS RRB Office Assistant 2020 Paper

The sum of the ages of 4 members of a family 5 yr ago was 94 yr. Today, when the daughter has been married off and replaced by a daughter-in-law, the sum of their ages is 92 yr. Assuming that there has been no other change in the family structure and all the people are alive, what is the difference in the age of the daughter and the daughter-in-law?