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Q.
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :
A.
35
B.
36.5
C.
40
D.
42
View Answer
Correct choice: B
Explanation:
Correct Sum = (36 * 50 + 48 - 23) = 1825. Correct mean = = 1825/50 = 36.5
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