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    Question

    In a college, 40% of the students were group A,

    75% of the remaining were given group B and the remaining 12 students were given group C. Then the number of students who applied for the group is :
    A 60 Correct Answer Incorrect Answer
    B 80 Correct Answer Incorrect Answer
    C 92 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    Let total number of student in the group be x Then, students in group A = `x xx40/100 = (2x)/5` Students in group B = [if gte vml 1]> [if !vml]-->`(3x)/5xx75/100 = (9x)/20` [endif]--> Students in group C = x -`((2x)/5-(9x)/20)` ` ` [endif]--> [if gte vml 1]> [if !vml]-->`=>12 = (20x-8x-9x)/20` [endif]--> From question, 3x = 240 x = 80

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