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SSC Quantitative Aptitude Percentage Question Bank Percentage (II)

  • question_answer
    In two successive years, 100 and 75 students of a school appeared at the final examination. Respectively 75% and 60% of them passed. The average rate of pass is

    A) \[68\frac{4}{7}%\]

    B) \[78%\]

    C) \[80%\]

    D) \[80\frac{1}{2}%\]

    Correct Answer: A

    Solution :

    [a] Total candidates \[=(100+75)=175\] Total Passed \[=\left( \frac{75}{100}\times 100 \right)+\left( \frac{60}{100}\times 75 \right)\] \[=(75+45)=120\] \[\therefore \] Pass per cent \[=\left( \frac{120}{175}\times 100 \right)%\]                         \[=\frac{480}{7}%=68\frac{4}{7}%\]


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