There were some green, yellow and white notebooks in a box.
110 of the notebooks were yellow. The ratio of the number of green notebooks to the number of white notebooks was 4 : 5. There were 304 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 |
1 |
9 |
10 |
|
4 |
5 |
|
1 u |
4 u |
5 u |
10 u |
(a)
Green : Yellow : White
4 : 1 : 5
(b)
Number of fewer yellow notebooks than white notebooks
= 5 u - 1 u
= 4 u
4 u = 304
1 u = 304 ÷ 4 = 76
Number of white notebooks
= 5 u
= 5 x 76
= 380
Answer(s): (a) 4 : 1 : 5; (b) 380