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    Question

    What is the overall average of marks for all the

    students if three groups consist of 45, 35, and 40 students with average marks of 40, 60, and 45, respectively?
    A 32.7 Correct Answer Incorrect Answer
    B 65.2 Correct Answer Incorrect Answer
    C 55.5 Correct Answer Incorrect Answer
    D 47.5 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Required average = (45 × 40 + 35 × 60 + 40 × 45)/(45 + 35 + 40) = 5700/120 = 47.5

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