2. Sample Papers
  3. Railways

Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-16

  • question_answer
    The average age of A and B is 20 years. If C were to replace A, the average would be 19 and if C were to replace B, the average would be 21. What are the age of A, B and C?

    A) \[22,18,20\]           

    B)  \[20,20,18\]                  

    C)  \[18,22,20\]          

    D)        None of these

    Correct Answer: A

    Solution :

            Given      \[A+B=40~\]      .....(i) \[C+B=38\]          .....(ii) \[A+C=42~\]     ?...(iii) \[(i)+(ii)+(iii)\Rightarrow A+B+C=60\]  ...(iv) from (i) and (iv), we get \[C=20\]years \[\therefore \] \[B=18\]years and \[A=22\]years


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