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 ?	Choose one:
A) 12	B) 16	C) 18	D) 9	E) 12
Explanation:   Suppose the boy got x sums right and 2x sums wrong.   Then, x + 2x = 27 3x = 27 x = 9.   Answer:9
<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 ?