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    Question

    Among 1080 students in an institute, the ratio of boys to

    girls is 6:3. If 10% of boys and 20% of girls failed their exams, calculate the number of failed students.
    A 240 Correct Answer Incorrect Answer
    B 160 Correct Answer Incorrect Answer
    C 144 Correct Answer Incorrect Answer
    D 285 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Number of boys = (6/9) ├Ч 1080 = 720

    Number of girls = (3/9) ├Ч 1080 = 360

    Required number of students = 0.10 ├Ч 720 + 0.20 ├Ч 360 = 72 + 72 = 144

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