2. Solved Papers
  3. Railways

Railways R.R.C. (Jabalpur) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    Kapil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of students in the class is?

    A) 10                                

    B) 20

    C) 40                                

    D) 73

    Correct Answer: C

    Solution :

    Let the number of students in the class x Then,     \[x\times 1+83-63=x\left( 1+\frac{1}{2} \right)\] \[x+20=\frac{3}{2}x\] \[20=\frac{x}{2}\] \[x=40\]        


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