Question

    The Average weight of 12 students in the class is 38

    kg, when 4 new students included, the average weight becomes 39.5 kg and the weight of those 4 students was 46, 52, 36 and 42 kg. Find the total number of students in the class?
    A 12 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 18 Correct Answer Incorrect Answer
    D 22 Correct Answer Incorrect Answer

    Solution

    Average weight of new students = (46+52+36+42)/4 = 44 3 units = 12 students Total = 12 + 4 = 16 students

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