PSLE A bag contains erasers of three different colours.
17 of the erasers are orange. The ratio of the number of blue 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 |
Blue |
Green |
Total |
1x1 |
6x1 |
7x1 |
|
1x3 |
1x3 |
|
1 u |
3 u |
3 u |
7 u |
The total number of green and blue erasers is the combined repeated identity.
Make the total number green and blue erasers the same.
LCM of 6 and 2 = 6
Orange : Green
1 : 3
Answer(s): 1 : 3