PSLE A bag contains erasers of three different colours.
15 of the erasers are orange. The ratio of the number of brown erasers to that of green erasers is 1 : 1. What is the ratio of the number of orange erasers to that of green erasers?
Orange |
Brown |
Green |
Total |
1x1 |
4x1 |
5x1 |
|
1x2 |
1x2 |
|
1 u |
2 u |
2 u |
5 u |
The total number of green and brown erasers is the combined repeated identity.
Make the total number green and brown erasers the same.
LCM of 4 and 2 = 4
Orange : Green
1 : 2
Answer(s): 1 : 2