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SSC Quantitative Aptitude Average Question Bank Average (II)

  • question_answer
    The average of the test scores of a class of 'm' students is 70 and that of 'n' students is 91. When the scores of both the classes are combined, the average is 80. What is n/m?

    A) 11/10

    B) 13/10

    C) 10/13

    D) 10/11

    Correct Answer: D

    Solution :

    [d] According to the question, \[70\,m+91\,n=80\,(m+n)\] \[\Rightarrow \]   \[70\,m+91\,n=80\,m+80\,n\] \[\Rightarrow \]   \[10\,m=11\,n\] \[\Rightarrow \]    \[\frac{n}{m}=\frac{10}{11}\]


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