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    Question

    In a school, girls constitute 45% of the total strength

    of the school. Out of total number of students, 20% students were selected for annual sports competition which is 420 less than number of boys in the school. Find the number of girls selected for annual sports if the number of boys selected is 140.
    A 150 Correct Answer Incorrect Answer
    B 90 Correct Answer Incorrect Answer
    C 60 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let total number of students in the school be тАШxтАЩ
    According to the question,
    0.20x + 420 = 0.55x
    Or, x = 420/0.35 = 1200
    Number of girls selected = 0.20x тАУ 140 = 100

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