A) 25%
B) 20%
C) 30%
D) 50%
Correct Answer: A
Solution :
\[\text{Gain }\!\!%\!\!\text{ =}\frac{\text{No}\text{.}\,\text{of}\,\text{articles}\,\text{on}\,\text{CP}-\text{No}\text{.}\,\text{of}\,\text{articles}\,\text{on}\,\text{SP}}{\text{No}\text{.}\,\text{of}\,\text{articles}\,\text{on}\,\text{SP}}\text{ }\!\!\times\!\!\text{ 100}\] \[B=\sqrt{b}:\sqrt{a}\]
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