2. Solved Papers
  3. Railways

Railways R.R.C. (Patna) Solved Paper Held on 1st Shift 2-11-2014

  • question_answer
    The average age of a class is 15-8 years. The average age of boys in the class is 16-4 years and that of the girls is 15-4 years. What is the ratio of boys to girls in the class?

    A) 1 : 2                             

    B) 1 : 1

    C) 3 : 4                             

    D) 2 : 3

    Correct Answer: D

    Solution :

    Suppose number of boys and girls are x and y respectively. Then,    \[16.4x+15.4y=15.8x+15.8y\] \[0.6x=0.4y\] \[\frac{x}{y}=\frac{2}{3}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner