The cost price of 60 articles is the same as the selling price of x articles. If the profit is 20%, what is x?
Select the correct option:  A) 42  B) 45  C) 48  D) 50  E) 54

Rationale: "let the cost price = y the cost price of 60 articles = 60 y the selling price of x articles = 1.20 y * x 1.20 y * x = 60 y x = 60 / 1.2 = 50 the answer is d ."
Answer: D