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 5 : 3. What is the ratio of the number of red erasers to that of orange erasers?
Red |
Green |
Orange |
Total |
1x8 |
5x8 |
6x8 |
|
5x5 |
3x5 |
|
8 u |
25 u |
15 u |
48 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 8 = 40
Red : Orange
8 : 15
Answer(s): 8 : 15