Only one of the four options is correct. Write the correct one.
In a box, the ratio of red marbles to blue marbles is 7:4. Which of the following could be the total number of marbles in the box?
(A) 18 (B) 19 (C) 21 (D) 22
Given: Ratio is 7:4.
The sum of the given ratio=11
Hence 22 is the only option which could be the total number of marbles in the box.
Option (D) is correct.