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SSC Quantitative Aptitude Average Question Bank Average (I)

  • question_answer
    When the average age of a husband and wife and their son was 42 yr, the son got married and a child was born just 1 yr after their marriage. When child turned to be 5 yr, then the average of the family became 36 yr. What was the age of daughter-in-law at the time of marriage?

    A) 26 yr

    B) 25 yr

    C) 24 yr

    D) 23 yr

    Correct Answer: B

    Solution :

    [b] At the time of son's marriage, \[H+W+S=(42\times 3)=126\] and let the age of daughter-in-law be D yr, 6 yr after marriage \[126+(6\times 3)+5+(D+6)=(36\times 5)\] \[\Rightarrow \]   \[155+D=180\] \[\Rightarrow \]   \[D=(180-155)=25\] Age of daughter-in-law at the time of marriage = 25 yr.


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