A) 40
B) 41
C) 42
D) 43
Correct Answer: C
Solution :
Incorrect mean of 9 observations = 35 Incorrect sum of 9 observations \[=35\times 9=315\] Since, 81 is misread as 18. So, correct sum of observations \[=315-18+81=378\] \[\therefore \] Correct mean \[=\frac{378}{9}=42\]You need to login to perform this action.
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