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Joint Entrance Examination
Mathematics
Statistics
Question 162
Question 162 of 208
Easy
MCQ
The mean of a data set consisting of 20 observations is 40. If one observation 53 was wrongly recorded as 33, then the correct mean will be:
A
41
B
49
C
40.5
D
42.5
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Official solution
\[\text{Correct mean} = \frac{20(40)-33+53}{20} = \frac{800+20}{20}=41\]
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