PSLE A bag contains erasers of three different colours.
110 of the erasers are blue. The ratio of the number of orange erasers to that of yellow erasers is 3 : 1. What is the ratio of the number of blue erasers to that of yellow erasers?
Blue |
Orange |
Yellow |
Total |
1x4 |
9x4 |
10x4 |
|
3x9 |
1x9 |
|
4 u |
27 u |
9 u |
40 u |
The total number of yellow and orange erasers is the combined repeated identity.
Make the total number yellow and orange erasers the same.
LCM of 9 and 4 = 36
Blue : Yellow
4 : 9
Answer(s): 4 : 9