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    Question

    Class ‘K’ has number of girls as 90% of boys in that

    class. Class ‘L’ has 10% fewer boys than class ‘K’ and 35% more total students than class ‘K’. Find the ratio of girls in class ‘K’ to that in class ‘L’.
    A 7:13 Correct Answer Incorrect Answer
    B 20:37 Correct Answer Incorrect Answer
    C 9:5 Correct Answer Incorrect Answer
    D 3:5 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the number of boys in class ‘K’ = 100x

    Then, number of girls in class ‘K’ = 0.90 × 100x = 90x

    Number of boys in class ‘L’ = 0.90 × 100x = 90x

    Total number of students in class ‘L’ = (100x + 90x) × (135/100) = 256.5x

    Number of girls in class ‘L’ = 256.5x – 90x = 166.5x

    Required ratio = (90x):(166.5x) = 20:37

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