The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, find out the value of x
Options.
A) 13	B) 14	C) 15	D) 16	E) 17

Rationale: "explanation : let the cost price of one article = rs . 1 cp of x articles = rs . x cp of 20 articles = 20 selling price of x articles = 20 profit = 25 % [ given ] ⇒ ( sp − cp / cp ) = 25 / 100 = 1 / 4 ⇒ ( 20 − x ) / x = 1 / 4 ⇒ 80 − 4 x = x ⇒ 5 x = 80 option d ⇒ x = 805 = 16"
Answer: D