A) 20%
B) \[16\frac{4}{5}%\]
C) 18%
D) \[8\frac{2}{6}%\]
Correct Answer: A
Solution :
We know that if the cost price of x articles equals the selling price of w articles, then Per cent profit \[=\frac{x-w}{w}\times 100%\] Hence, x = 36, w = 30 \[\therefore \]Percent profit\[=\frac{36-30}{30}\times 100%\] \[=\frac{600}{30}%=20%\]
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