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

    Question

    A batsman scores 87 runs in the 21st match of his

    career. His average runs per match increases by 2. What was his average before the 21st match.
    A 45 Correct Answer Incorrect Answer
    B 46 Correct Answer Incorrect Answer
    C 44 Correct Answer Incorrect Answer
    D 43 Correct Answer Incorrect Answer

    Solution

    Sum of scores till 20 matches=S average of 20 matches=x S=20x (S+87)/21 =x+2 20x+87=21x+42 X = 45

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