If the cost price of 50 articles is equal to the selling price of 45 articles, then the gain or loss percent is?	Choices
A) 11.11	B) 65	C) 78	D) 33	E) 25

Rationale: "given that , cost price of 50 article is equal to selling price of 45 articles . let cost price of one article = rs . 1 selling price of 45 articles = rs . 50 but cost price of 45 articles = rs . 45 therefore , the trader made profit . \ percentage of profit = 5 / 45 * 100 = 11.11 % answer : a"
Answer: A