7th Class Mathematics Related to Competitive Exam Question Bank Number and Ranking

  • question_answer
    Some boys are sitting in a line. Mahendra is on 17th place from left and Surendra is on 18th place from right. There are 8 boys in between them. How many boys are there in the line?

    A) 43              

    B) 42

    C) 41                          

    D) 44

    Correct Answer: A

    Solution :

    Total boys \[=\left[ \begin{matrix}    \text{Mahendra }\!\!'\!\!\text{ s} & \text{+Surendra }\!\!'\!\!\text{ s}  \\    \text{place} & \text{place}  \\    \text{from}\,\text{left} & \text{from}\,\text{right}  \\ \end{matrix} \right]+\left[ \begin{align}   & Boys\,between \\  & \text{them} \\ \end{align} \right]\] \[=[17+18]+8=43\]         


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