PSLE A bag contains erasers of three different colours.
16 of the erasers are red. The ratio of the number of green erasers to that of orange erasers is 1 : 1. What is the ratio of the number of red erasers to that of orange erasers?
Red |
Green |
Orange |
Total |
1x2 |
5x2 |
6x2 |
|
1x5 |
1x5 |
|
2 u |
5 u |
5 u |
12 u |
The total number of orange and green erasers is the combined repeated identity.
Make the total number orange and green erasers the same.
LCM of 5 and 2 = 10
Red : Orange
2 : 5
Answer(s): 2 : 5