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9th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    In an examination, 34% of the students failed in Mathematics and 42% failed in English. If 20% of the students failed in both the subjects, then find the of who passed in both the subjects.

    A) 40%                   

    B)         42%

    C) 44%      

    D)       46%

    E) None of these

    Correct Answer: C

    Solution :

    Explanation Option [c] is correct. Failed in Mathematics, n[a] = 34 Failed in English, n[b] = 42 \[n\left( A\bigcup B \right)=n\left( A \right)-m\left( B \right)\text{ }n\left( A\bigcap B \right)-34\text{ }+\text{ }42-20\text{ }=\text{ }56\] Failed in either or both subjects are 56 Percentage passed - (100 ? 56) % ? 44%             


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