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	Choices.
A) 13  B) 14  C) 15  D) 16  E) 17
<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<result>D</result>
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
divide(multiply(20, const_4), add(const_4, const_1))
"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"