PSLE A bag contains erasers of three different colours.
18 of the erasers are green. The ratio of the number of blue erasers to that of yellow erasers is 1 : 1. What is the ratio of the number of green erasers to that of yellow erasers?
Green |
Blue |
Yellow |
Total |
1x2 |
7x2 |
8x2 |
|
1x7 |
1x7 |
|
2 u |
7 u |
7 u |
16 u |
The total number of yellow and blue erasers is the combined repeated identity.
Make the total number yellow and blue erasers the same.
LCM of 7 and 2 = 14
Green : Yellow
2 : 7
Answer(s): 2 : 7