PSLE A bag contains erasers of three different colours.
19 of the erasers are orange. The ratio of the number of red erasers to that of brown erasers is 1 : 1. What is the ratio of the number of orange erasers to that of brown erasers?
Orange |
Red |
Brown |
Total |
1x1 |
8x1 |
9x1 |
|
1x4 |
1x4 |
|
1 u |
4 u |
4 u |
9 u |
The total number of brown and red erasers is the combined repeated identity.
Make the total number brown and red erasers the same.
LCM of 8 and 2 = 8
Orange : Brown
1 : 4
Answer(s): 1 : 4