PSLE A bag contains erasers of three different colours.
18 of the erasers are yellow. The ratio of the number of blue erasers to that of orange erasers is 2 : 1. What is the ratio of the number of blue erasers to that of yellow erasers?
Yellow |
Blue |
Orange |
Total |
1x3 |
7x3 |
8x3 |
|
2x7 |
1x7 |
|
3 u |
14 u |
7 u |
24 u |
The total number of orange and blue erasers is the combined repeated identity.
Make the total number orange and blue erasers the same.
LCM of 7 and 3 = 21
Blue : Yellow
14 : 3
Answer(s): 14 : 3