PSLE A bag contains erasers of three different colours.
110 of the erasers are orange. The ratio of the number of blue erasers to that of purple erasers is 4 : 1. What is the ratio of the number of orange erasers to that of purple erasers?
Orange |
Blue |
Purple |
Total |
1x5 |
9x5 |
10x5 |
|
4x9 |
1x9 |
|
5 u |
36 u |
9 u |
50 u |
The total number of purple and blue erasers is the combined repeated identity.
Make the total number purple and blue erasers the same.
LCM of 9 and 5 = 45
Orange : Purple
5 : 9
Answer(s): 5 : 9