Question:
Mean of 25 observations was found to be 78.4. But later it was found that 96 was misread as
69. The correct mean is
Mean of 25 observations was found to be 78.4. But later it was found that 96 was misread as
69. The correct mean is
Show Hint
Always correct total before recalculating mean.
Updated On: Mar 18, 2026
- 79.24
- 79.48
- 80.10
- None of these
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The Correct Option is A
Solution and Explanation
Step 1: Wrong total: 25×78.4=1960
Step 2: Correct total: 1960+(96-69)=1987
Step 3: Correct mean: (1987)/(25)=79.48
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