PSLE A bag contains erasers of three different colours.
17 of the erasers are green. The ratio of the number of purple erasers to that of red erasers is 2 : 1. What is the ratio of the number of green erasers to that of red erasers?
Green |
Purple |
Red |
Total |
1x1 |
6x1 |
7x1 |
|
2x2 |
1x2 |
|
1 u |
4 u |
2 u |
7 u |
The total number of red and purple erasers is the combined repeated identity.
Make the total number red and purple erasers the same.
LCM of 6 and 3 = 6
Green : Red
1 : 2
Answer(s): 1 : 2