There were some blue, red and green staplers in a box.
19 of the staplers were red. The ratio of the number of blue staplers to the number of green staplers was 3 : 5. There were 260 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 |
1 |
8 |
9 |
|
3 |
5 |
|
1 u |
3 u |
5 u |
9 u |
(a)
Blue : Red : Green
3 : 1 : 5
(b)
Number of fewer red staplers than green staplers
= 5 u - 1 u
= 4 u
4 u = 260
1 u = 260 ÷ 4 = 65
Number of green staplers
= 5 u
= 5 x 65
= 325
Answer(s): (a) 3 : 1 : 5; (b) 325