PSLE A bag contains erasers of three different colours.
112 of the erasers are red. The ratio of the number of blue erasers to that of yellow erasers is 2 : 1. What is the ratio of the number of red erasers to that of yellow erasers?
Red |
Blue |
Yellow |
Total |
1x3 |
11x3 |
12x3 |
|
2x11 |
1x11 |
|
3 u |
22 u |
11 u |
36 u |
The total number of yellow and blue erasers is the combined repeated identity.
Make the total number yellow and blue erasers the same.
LCM of 11 and 3 = 33
Red : Yellow
3 : 11
Answer(s): 3 : 11