### Question

**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. 14

B. 16

C. 18

D. 12

**Answer:** B

**Solution:**

Suppose the boy got x sums right and 2x sums wrong. Then,

x + 2x = 48

⇒ 3x = 48

**⇒ x = 16.**