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    Question

    60 percent students in a school are boys. 40 percent

    boys passed in the examination. If 35 percent of total students passed the examination, then what percent of girls failed the examination?
    A 72.5 Correct Answer Incorrect Answer
    B 29 Correct Answer Incorrect Answer
    C 56.5 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer

    Solution

    Let the total number of students in the school be 1000. Number of boys = 60% of 1000 = 600 Then, number of girls = 1000 - 600 = 400 Number of boys who failed the exam = (100 - 40)% of 600 = 360 Number of students who failed = (100 - 35)% of 1000 = 650 Then, number of girls who failed = total fail - boys who failed = 650 - 360 = 290 girls Percentage of girls who failed = (failed girls/total girls) × 100 = (290/400) × 100  ∴ Percentage of girls wo failed is 72.5%.

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