There were some yellow, white and pink notebooks in a box.
211 of the notebooks were white. The ratio of the number of yellow notebooks to the number of pink notebooks was 4 : 5. There were 297 fewer white notebooks than pink notebooks.
- Find the ratio of the number of yellow notebooks to the number of white notebooks to the number of pink notebooks in the box.
- How many pink notebooks were there?
White |
Yellow |
Pink |
Total |
2 |
9 |
11 |
|
4 |
5 |
|
2 u |
4 u |
5 u |
11 u |
(a)
Yellow : White : Pink
4 : 2 : 5
(b)
Number of fewer white notebooks than pink notebooks
= 5 u - 2 u
= 3 u
3 u = 297
1 u = 297 ÷ 3 = 99
Number of pink notebooks
= 5 u
= 5 x 99
= 495
Answer(s): (a) 4 : 2 : 5; (b) 495