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    Question

    In a school, 850 students are taking a test. The ratio

    of boys to girls is 9:8, and the test fee for each girl is 30% less than that for a boy. If the total test fees paid by all students amounts to Rs. 8,76,000, what is the test fee for a girl?
    A 780 Correct Answer Incorrect Answer
    B 820 Correct Answer Incorrect Answer
    C 800 Correct Answer Incorrect Answer
    D 840 Correct Answer Incorrect Answer
    E 450 Correct Answer Incorrect Answer

    Solution

    9a+8a = 850 17a = 850 a = 50 number of Boys = 9a = 450 number of Girls = 8a = 400 let the test fee for Boys = 10x then, test fee for Girls = 7x according to question- 450 × 10x + 400 × 7x = 8,76000 4500x + 2800x = 8,76,000 7300x = 8,76,000 X = 120 test fee for Girls = 7x = 840

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