PSLE A bag contains erasers of three different colours.
12 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 |
1x7 |
2x7 |
|
6x1 |
1x1 |
|
7 u |
6 u |
1 u |
14 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 1 and 7 = 7
Yellow : Red
7 : 1
Answer(s): 7 : 1