a student got twice as many sums wrong as he got right. if he attempted 27 sums in all, how many did he solve correctly?  Pick one:
A) 12	B) 16	C) 18	D) 9	E) 12
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>D</result>
a student got twice as many sums wrong as he got right. if he attempted 27 sums in all, how many did he solve correctly?
divide(27, add(const_1, const_2))
"explanation : suppose the boy got x sums right and 2 x sums wrong . then , x + 2 x = 27 3 x = 27 x = 9 . answer : d"