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    Question

    In a class, the ratio of boys to girls present is 4:3. The

    number of girls who are absent is 21 which is 30% of the total number of students. If all boys are present, find the number of boys in the class.
    A 30 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 32 Correct Answer Incorrect Answer
    E 35 Correct Answer Incorrect Answer

    Solution

    Total number of students = 21/0.30 = 70
    Number of students who are present = 70 – 21 = 49
    Therefore, number of boys in the class = 49 × 4/7 = 28

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