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    Question

    In a school, 40% of the students are girls, and the rest

    are boys. During the annual sports event, 30% of the girls and 50% of the boys took part. If the number of girls who did not participate is 420, determine the total number of students in the school.
    A 1450 Correct Answer Incorrect Answer
    B 1550 Correct Answer Incorrect Answer
    C 1650 Correct Answer Incorrect Answer
    D 1500 Correct Answer Incorrect Answer
    E 1900 Correct Answer Incorrect Answer

    Solution

    Let the total number of students in school = 100x Number of Girls = 40x Number of Boys = 60x According to question- 70% of 40x = 420 x = 420/28 x = 15 total number of students in school = 100x = 1500

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