A) 2600
B) 52000
C) 2510
D) None of these
Correct Answer: B
Solution :
\[SD\,=\sqrt{\frac{\sum{X_{i}^{2}}}{n}-{{(\overline{X})}^{2}}}\]f \[\therefore \] \[10\,=\sqrt{\frac{\sum{X_{i}^{2}}}{20}-{{(50)}^{2}}}\] \[\Rightarrow \] \[100=\,\frac{\sum{x_{i}^{2}}}{20}-2500\] \[\Rightarrow \] \[\sum{x_{i}^{2}}=52000\]You need to login to perform this action.
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