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    5. The average marks scored by 30 boys and 40 girls are 75 and 85 respectively. Find the average marks

    Question

    The average marks scored by 30 boys and 40 girls are 75

    and 85 respectively. Find the average marks scored by all the students together. (Answer should be rounded off to the nearest integer)
    A 81 Correct Answer Incorrect Answer
    B 60 Correct Answer Incorrect Answer
    C 44 Correct Answer Incorrect Answer
    D 79 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Required average = (30 X 75 + 40 X 85) ÷ (30 + 40) = (2,250 + 3,400) ÷ 70 = (5,650 / 70) ≈ 81

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