7th Class Mathematics Integers 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 :

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


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