Only one of the four options is correct. Write the correct one.
On a shelf, books with green cover and that with brown cover are in the ratio 2:3. If there are 18 books with green cover, then the number of books with brown cover is
(A) 12 (B) 24 (C) 27 (D) 36
Given: Ratio of the number of green cover and brown cover books is 2:3.
The number of green cover books =18
Option C is correct.