In a class 3/4th of the students do not know either English or Hindi. But 1/6th of the students know English. How many students know both English and Hindi if students who know Hindi are 1/8th of total students in the class?

A) 1/24

B) 100/24

C) 10/4

D) 1/4

3/4th do not know English or Hindi 

So 1/4th know English or Hindi or both

1/6th know English and 1/8th know Hindi 
Now, 1/4 – 1/6 – 1/8= 1/24