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    Question

    A group of 20 players

    has an average score of 55 runs. If x new players join with an average score of 70 runs, the new average becomes 58 runs. Find x.
    A 5 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    ATQ, 20 * 55 + x * 70 = (20 + x) * 58 1100 + 70x = (20 + x) * 58 70x тАУ 58x = 1160 тАУ 1100 12x = 60 x = 5

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