PSLE A bag contains erasers of three different colours.
19 of the erasers are green. The ratio of the number of blue erasers to that of red erasers is 5 : 1. What is the ratio of the number of blue erasers to that of green erasers?
Green |
Blue |
Red |
Total |
1x3 |
8x3 |
9x3 |
|
5x4 |
1x4 |
|
3 u |
20 u |
4 u |
27 u |
The total number of red and blue erasers is the combined repeated identity.
Make the total number red and blue erasers the same.
LCM of 8 and 6 = 24
Blue : Green
20 : 3
Answer(s): 20 : 3