There were some green, yellow and white pens in a box.
110 of the pens were yellow. The ratio of the number of green pens to the number of white pens was 4 : 5. There were 348 fewer yellow pens than white pens.
- Find the ratio of the number of green pens to the number of yellow pens to the number of white pens in the box.
- How many white pens 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 pens than white pens
= 5 u - 1 u
= 4 u
4 u = 348
1 u = 348 ÷ 4 = 87
Number of white pens
= 5 u
= 5 x 87
= 435
Answer(s): (a) 4 : 1 : 5; (b) 435