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    Question

    In a class of 80 students, 60% are boys, and the

    remaining are girls. Out of the boys, 25% are good in mathematics, and out of the girls, 50% are good in mathematics. How many students are good in mathematics?
    A 25 Correct Answer Incorrect Answer
    B 26 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer
    E None Correct Answer Incorrect Answer

    Solution

    Number of boys = 60% of 80 = 48. Number of girls = 80 - 48 = 32. Number of boys good in mathematics = 25% of 48 = 12. Number of girls good in mathematics = 50% of 32 = 16. Total students good in mathematics = 12 + 16 = 28.

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