A student got twice as many sums wrong as he got right. If he attempted 75 sums in all, how many did he solve correctly ? Choose the correct answer:  A) 25  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 = 75 3 x = 75 x = 25 . answer : a"
Answer: A