A student got twice as many sums wrong as he got right. If he attempted 36 sums in all, how many did he solve correctly ?  Choose the correct option
A) 12	B) 16	C) 18	D) 24	E) 26

Rationale: "explanation : suppose the boy got x sums right and 2 x sums wrong . then , x + 2 x = 36 3 x = 36 x = 12 . answer : a"
Answer: A