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    Question

    Average run scored by a batsman in first β€˜x’ matches

    is 55. In next 12 matches he scored runs with an average of 90 so that his overall average increased by 10. Find the value of x.
    A 40 Correct Answer Incorrect Answer
    B 30 Correct Answer Incorrect Answer
    C 44 Correct Answer Incorrect Answer
    D 42 Correct Answer Incorrect Answer

    Solution

    (55x + 12 Γ— 90)/(x + 12) = 65 Β => 55x + 1080 = 65x + 780 => 10x = 300 => x = 30

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