The mean of 25 observations was found to be 78 4…

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The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct means is-

  1. A. 76.54
  2. B. 78.4
  3. C. 79.48
  4. D. 81.32

Answer: Option C

Here is complete explanation of The mean of 25 observations was found to be 78 4….

Solution(By ExamCraze Team)

Correct sum = (78.4 × 25 + 96 - 69) = 1987
∴ Correct mean
= $$frac{1987}{25}$$
= 79.48

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