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

  • question_answer
    Roshan ranked 11th from the top and thirty one from the bottom in a class. How many students are there in the class?

    A) 42                                          

    B) 43

    C) 41               

    D) 40

    Correct Answer: C

    Solution :

     \[{{T}_{r}}=11,\]\[{{B}_{r}}=31\] \[\Rightarrow \]no. of students \[={{T}_{r}}+{{B}_{r}}-1=11+31-1=41\]  


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