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 the correct choice from the following answers
A) 12 B) 16 C) 18 D) 9 E) 12

Rationale: "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"
Answer: D