PSLE A bag contains erasers of three different colours.
16 of the erasers are orange. The ratio of the number of green erasers to that of red erasers is 3 : 5. What is the ratio of the number of orange erasers to that of red erasers?
Orange |
Green |
Red |
Total |
1x8 |
5x8 |
6x8 |
|
3x5 |
5x5 |
|
8 u |
15 u |
25 u |
48 u |
The total number of red and green erasers is the combined repeated identity.
Make the total number red and green erasers the same.
LCM of 5 and 8 = 40
Orange : Red
8 : 25
Answer(s): 8 : 25