There were some blue, red and green staplers in a box.
211 of the staplers were red. The ratio of the number of blue staplers to the number of green staplers was 4 : 5. There were 252 fewer red staplers than green staplers.
- Find the ratio of the number of blue staplers to the number of red staplers to the number of green staplers in the box.
- How many green staplers were there?
Red |
Blue |
Green |
Total |
2 |
9 |
11 |
|
4 |
5 |
|
2 u |
4 u |
5 u |
11 u |
(a)
Blue : Red : Green
4 : 2 : 5
(b)
Number of fewer red staplers than green staplers
= 5 u - 2 u
= 3 u
3 u = 252
1 u = 252 ÷ 3 = 84
Number of green staplers
= 5 u
= 5 x 84
= 420
Answer(s): (a) 4 : 2 : 5; (b) 420