PSLE A bag contains erasers of three different colours.
14 of the erasers are yellow. The ratio of the number of orange erasers to that of red erasers is 6 : 1. What is the ratio of the number of yellow erasers to that of red erasers?
Yellow |
Orange |
Red |
Total |
1x7 |
3x7 |
4x7 |
|
6x3 |
1x3 |
|
7 u |
18 u |
3 u |
28 u |
The total number of red and orange erasers is the combined repeated identity.
Make the total number red and orange erasers the same.
LCM of 3 and 7 = 21
Yellow : Red
7 : 3
Answer(s): 7 : 3