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Q: The mean of 100 observations is 40. It is found that an observation 84 was misread as 48. Then the correct mean is ?

  • 1
    40.36
  • 2
    41.24
  • 3
    41.92
  • 4
    42.05
  • Show Answer
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Answer : 1. "40.36"
Explanation :

Answer: A) 40.36 Explanation: Given, mean of 100 observations is 40 => Total of 100 observations = 40 x 100 = 4000 84 is misread as 48 => Difference = 84 - 48 = 36 => Now, new total of 100 observations = 4000 + 36 = 4036 Correct Mean = 4036/100 = 40.36

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