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      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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