Question

    A group of 30 students appeared in a test. The average

    score of 12 students is 62, and that of the rest is 62. What is the average score of the group?
    A 62 Correct Answer Incorrect Answer
    B 63 Correct Answer Incorrect Answer
    C 60 Correct Answer Incorrect Answer
    D 61 Correct Answer Incorrect Answer

    Solution

    Average of 12 students = 62

    Total score of 12 students = 12 × 62 = 744

    Remaining students = 30 - 12 = 18

    Average of 18 students = 62

    Total score of 18 students = 18 × 62 = 1116

    Total score of all 30 students = 744 + 1116 = 1860

    Average score of the group = 1860 ÷ 30 = 62

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