New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Average run scored by a batsman in first ‘x’ matches

    is 20. In next 5 matches he scored runs with an average of 60 so that his overall average increased by 10. Find the value of x.
    A 10 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 14 Correct Answer Incorrect Answer
    D 12 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    (20x + 5 × 60)/(x + 5) = 30  => 20x + 300 = 30x + 150 => 10x = 150 => x = 15

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