There were some red, green and yellow markers in a box.
211 of the markers were green. The ratio of the number of red markers to the number of yellow markers was 4 : 5. There were 312 fewer green markers than yellow markers.
- Find the ratio of the number of red markers to the number of green markers to the number of yellow markers in the box.
- How many yellow markers were there?
Green |
Red |
Yellow |
Total |
2 |
9 |
11 |
|
4 |
5 |
|
2 u |
4 u |
5 u |
11 u |
(a)
Red : Green : Yellow
4 : 2 : 5
(b)
Number of fewer green markers than yellow markers
= 5 u - 2 u
= 3 u
3 u = 312
1 u = 312 ÷ 3 = 104
Number of yellow markers
= 5 u
= 5 x 104
= 520
Answer(s): (a) 4 : 2 : 5; (b) 520