PSLE A bag contains erasers of three different colours.
13 of the erasers are green. The ratio of the number of yellow erasers to that of blue erasers is 1 : 9. What is the ratio of the number of yellow erasers to that of green erasers?
Green |
Yellow |
Blue |
Total |
1x5 |
2x5 |
3x5 |
|
1x1 |
9x1 |
|
5 u |
1 u |
9 u |
15 u |
The total number of blue and yellow erasers is the combined repeated identity.
Make the total number blue and yellow erasers the same.
LCM of 2 and 10 = 10
Yellow : Green
1 : 5
Answer(s): 1 : 5