There were some green, yellow and white notebooks in a box.
211 of the notebooks were yellow. The ratio of the number of green notebooks to the number of white notebooks was 4 : 5. There were 318 fewer yellow notebooks than white notebooks.
- Find the ratio of the number of green notebooks to the number of yellow notebooks to the number of white notebooks in the box.
- How many white notebooks were there?
Yellow |
Green |
White |
Total |
2 |
9 |
11 |
|
4 |
5 |
|
2 u |
4 u |
5 u |
11 u |
(a)
Green : Yellow : White
4 : 2 : 5
(b)
Number of fewer yellow notebooks than white notebooks
= 5 u - 2 u
= 3 u
3 u = 318
1 u = 318 ÷ 3 = 106
Number of white notebooks
= 5 u
= 5 x 106
= 530
Answer(s): (a) 4 : 2 : 5; (b) 530