PSLE A bag contains erasers of three different colours.
17 of the erasers are green. The ratio of the number of brown erasers to that of orange erasers is 1 : 3. What is the ratio of the number of green erasers to that of orange erasers?
Green |
Brown |
Orange |
Total |
1x2 |
6x2 |
7x2 |
|
1x3 |
3x3 |
|
2 u |
3 u |
9 u |
14 u |
The total number of orange and brown erasers is the combined repeated identity.
Make the total number orange and brown erasers the same.
LCM of 6 and 4 = 12
Green : Orange
2 : 9
Answer(s): 2 : 9