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Railways R.R.C. (Hajipur) Solved Paper Held on 1st Shift 30-11-2014

  • question_answer
    In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family?

    A) 2                                 

    B) 3

    C) 4                                 

    D) 5

    Correct Answer: B

    Solution :

    Suppose number of sons = x and number of daughters = v Then,                \[y-1=x\] y=x+1 and                   \[2\,\,(x-1)=y\]                                         \[2x-2=y\] On solving eqns. (1) and (2), then \[x=3\]


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