PSLE A bag contains erasers of three different colours.
110 of the erasers are yellow. The ratio of the number of purple erasers to that of blue erasers is 5 : 1. What is the ratio of the number of yellow erasers to that of blue erasers?
Yellow |
Purple |
Blue |
Total |
1x2 |
9x2 |
10x2 |
|
5x3 |
1x3 |
|
2 u |
15 u |
3 u |
20 u |
The total number of blue and purple erasers is the combined repeated identity.
Make the total number blue and purple erasers the same.
LCM of 9 and 6 = 18
Yellow : Blue
2 : 3
Answer(s): 2 : 3