A) 41
B) 49
C) 40.5
D) 42.5
Correct Answer: A
Solution :
Given; \[\frac{\sum{{{x}_{20}}}}{20}=40\Rightarrow \sum{{{x}_{20}}}=20\times 40=800\] \[\therefore \] \[\sum{{{x}_{20}}}=800-33+53=820\] \[\Rightarrow \] \[\frac{\sum{{{x}_{20}}}}{20}=\frac{820}{20}\] \[\therefore \] New mean \[=41\]You need to login to perform this action.
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