There are green, red and blue marbles in a bag their ratio is 5 : 4 : 6 respectively. If there are 135 marbles in the bag, what is the difference between the number of blue marbles and that of the red marbles?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18.
Total ratio parts = 5 + 4 + 6 = 15
Each part = = 9
Red marbles = 4 × 9 = 36
Blue marbles = 6 × 9 = 54
Difference = 54 − 36 = 18