PSLE A bag contains erasers of three different colours.
13 of the erasers are brown. The ratio of the number of blue erasers to that of yellow erasers is 7 : 2. What is the ratio of the number of blue erasers to that of brown erasers?
Brown |
Blue |
Yellow |
Total |
1x9 |
2x9 |
3x9 |
|
7x2 |
2x2 |
|
9 u |
14 u |
4 u |
27 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 2 and 9 = 18
Blue : Brown
14 : 9
Answer(s): 14 : 9