Arithmetic Reasoning - Verbal and Reasoning

Q1:

A student got twice as many sums wrong as he got right. If he attempted 48 sums in all, how many did he solve correctly ?

A 12

B 16

C 18

D 24

ANS:B - 16

Suppose the boy got x sums right and 2x sums wrong. Then, x + 2x = 48 3x = 48 x = 16.