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    Question

    In a class of 30 students, the average marks are 68. The

    average marks of 18 boys is 72. What is the average marks of the 12 girls?
    A 62 Correct Answer Incorrect Answer
    B 38 Correct Answer Incorrect Answer
    C 77 Correct Answer Incorrect Answer
    D 58 Correct Answer Incorrect Answer

    Solution

    ATQ, Total marks of all 30 students = 30 × 68 = 2040 Total marks of 18 boys = 18 × 72 = 1296 Total marks of 12 girls = 2040 − 1296 = 744 Average of girls = 744 / 12 = 62

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