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    Question

    Total number of students in a class is 1800, and the

    ratio of number of boys to girls is 4:5. If the number of boys and girls is increased by y% and (y тАУ 3)% respectively, then the total number of students in the class will become 2070. Find the value of y. (Can calculate approximate value)
    A 35.22% Correct Answer Incorrect Answer
    B 16.67% Correct Answer Incorrect Answer
    C 27 .55% Correct Answer Incorrect Answer
    D 25 .66% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Number of boys in the class before increase = (4/9) ├Ч1800=800 Number of girls in the class before increase = 1800 тАУ 800 = 1000 According to the question: So, the value of y is approximately 16.67%.

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