PSLE A bag contains erasers of three different colours.
110 of the erasers are red. The ratio of the number of yellow erasers to that of blue erasers is 2 : 3. What is the ratio of the number of red erasers to that of blue erasers?
Red |
Yellow |
Blue |
Total |
1x5 |
9x5 |
10x5 |
|
2x9 |
3x9 |
|
5 u |
18 u |
27 u |
50 u |
The total number of blue and yellow erasers is the combined repeated identity.
Make the total number blue and yellow erasers the same.
LCM of 9 and 5 = 45
Red : Blue
5 : 27
Answer(s): 5 : 27