PSLE A bag contains erasers of three different colours.
13 of the erasers are yellow. The ratio of the number of red erasers to that of brown erasers is 6 : 1. What is the ratio of the number of yellow erasers to that of brown erasers?
Yellow |
Red |
Brown |
Total |
1x7 |
2x7 |
3x7 |
|
6x2 |
1x2 |
|
7 u |
12 u |
2 u |
21 u |
The total number of brown and red erasers is the combined repeated identity.
Make the total number brown and red erasers the same.
LCM of 2 and 7 = 14
Yellow : Brown
7 : 2
Answer(s): 7 : 2