PSLE A bag contains erasers of three different colours.
15 of the erasers are green. The ratio of the number of brown erasers to that of orange erasers is 3 : 7. What is the ratio of the number of green erasers to that of orange erasers?
Green |
Brown |
Orange |
Total |
1x5 |
4x5 |
5x5 |
|
3x2 |
7x2 |
|
5 u |
6 u |
14 u |
25 u |
The total number of orange and brown erasers is the combined repeated identity.
Make the total number orange and brown erasers the same.
LCM of 4 and 10 = 20
Green : Orange
5 : 14
Answer(s): 5 : 14