If two typist can type two pages in two minutes, how many typists will it take to type 18 pages in six minutes?

A 3

B 6

C 9

D 18

Correct Answer: Option B

2 pages are typed in 2 minute by 2 typist

1 pages are typed in 1 minute by 2×2/2 typist

18 pages are typed in 6 minute by= (4×18)/(2×6)
= 72/12
= 6 typist