A) 28.5
B) 30.1
C) 29.6
D) 30.5
Correct Answer: B
Solution :
According to the given condition \[\sum\limits_{i=1}^{20}{({{x}_{i}}-30)=2}\] \[\Rightarrow \] \[\sum\limits_{i=1}^{20}{{{x}_{i}}-\sum\limits_{i=1}^{20}{(30)=2}}\] \[\Rightarrow \] \[\overline{x}=\frac{20.30}{20}+\frac{2}{20}\] \[=30+0.1=30.1\]
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