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    Question

    The average marks scored by 45 boys and 55 girls are 78

    and 84 respectively. Find the average marks scored by all the students together. (Answer should be rounded off to the nearest integer)
    A 44 Correct Answer Incorrect Answer
    B 60 Correct Answer Incorrect Answer
    C 81 Correct Answer Incorrect Answer
    D 79 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Required average = (45 X 78 + 55 X 84) ÷ (45 + 55) = (3,510 + 4,620) ÷ 100 = (8,130 / 100) ≈ 81

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