There were some red, green and yellow staplers in a box.
112 of the staplers were green. The ratio of the number of red staplers to the number of yellow staplers was 4 : 7. There were 258 fewer green staplers than yellow staplers.
- Find the ratio of the number of red staplers to the number of green staplers to the number of yellow staplers in the box.
- How many yellow staplers were there?
Green |
Red |
Yellow |
Total |
1 |
11 |
12 |
|
4 |
7 |
|
1 u |
4 u |
7 u |
12 u |
(a)
Red : Green : Yellow
4 : 1 : 7
(b)
Number of fewer green staplers than yellow staplers
= 7 u - 1 u
= 6 u
6 u = 258
1 u = 258 ÷ 6 = 43
Number of yellow staplers
= 7 u
= 7 x 43
= 301
Answer(s): (a) 4 : 1 : 7; (b) 301