A box has marbles in the ratio 5:3:2 (red: green: blue). If there are 100 marbles in total, how many are green?
Show answer & explanation
Correct answer: B
Explanation
Red : Green : Blue = 5 : 3 : 2
Total ratio = 5 + 3 + 2
= 10
Number of green marbles = (3/10) × 100 = 30