bookman purchased 55 copies of a new book released recently, 10 of which are hardback and sold for $ 20 each, and rest are paperback and sold for $ 10 each. if 14 copies were sold and the total value of the remaining books was 460, how many paperback copies were sold?	Choices.
A) 10 B) 11 C) 12 D) 13 E) 9
<gadget id="calculator">55 - 10</gadget>
<output>45</output>

<gadget id="calculator">45 * 10</gadget>
<output>450</output>

<gadget id="calculator">10 * 20</gadget>
<output>200</output>

<gadget id="calculator">450 + 200</gadget>
<output>650</output>

<gadget id="calculator">650 - 460</gadget>
<output>190</output>

<gadget id="calculator">gcd(55, 10)</gadget>
<output>5</output>

<gadget id="calculator">5 * 20</gadget>
<output>100</output>

<gadget id="calculator">190 - 100</gadget>
<output>90</output>

<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<result>E</result>
bookman purchased 55 copies of a new book released recently, 10 of which are hardback and sold for $ 20 each, and rest are paperback and sold for $ 10 each. if 14 copies were sold and the total value of the remaining books was 460, how many paperback copies were sold?
divide(subtract(subtract(add(multiply(subtract(55, 10), 10), multiply(10, 20)), 460), multiply(gcd(55, 10), 20)), 10)
"the bookman had 10 hardback ad 55 - 10 = 45 paperback copies ; 14 copies were sold , hence 55 - 14 = 41 copies were left . let # of paperback copies left be p then 10 p + 20 ( 41 - p ) = 460 - - > 10 p = 360 - - > p = 36 # of paperback copies sold is 45 - 36 = 9 answer : e"