A student got twice as many sums wrong as he got right. If he attempted 54 sums in all, how many did he solve correctly ?
Select the correct option.
A) 12 B) 16 C) 18 D) 24 E) 26
Explanation:   Suppose the boy got x sums right and 2x sums wrong.   Then, x + 2x = 54 3x = 54 x = 18.   Answer:18
<result>C</result>
A student got twice as many sums wrong as he got right. If he attempted 54 sums in all, how many did he solve correctly ?