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    Question

    In a class, the number of students studying English and

    Math is in the ratio 3:4. If 12 additional students join the Math group, the ratio of students studying English to those studying Math changes to 3:5. What was the initial number of students in the English group?
    A 20 Correct Answer Incorrect Answer
    B 22 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer
    E 36 Correct Answer Incorrect Answer

    Solution

    Initial ratio of the students studying English and Math = 3: 4 After joining of 12 students of math group ratio becomes = 3: 5 Student of English group remains unchanged, 5x-4x = 12 x = 12 students in English group = 3x = 36

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