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

    Question

    For a group of 100 students, the mean and standard

    deviation of scores were found to be 30 and 5 respectively. Later on it was discovered that the scores 34 and 53 were misread as 43 and 35 respectively. The corrected mean equals to:
    A 30.09 Correct Answer Incorrect Answer
    B 30.01 Correct Answer Incorrect Answer
    C 30.41 Correct Answer Incorrect Answer
    D 30.05 Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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