PSLE A bag contains erasers of three different colours.
17 of the erasers are brown. The ratio of the number of blue erasers to that of orange erasers is 4 : 3. What is the ratio of the number of blue erasers to that of brown erasers?
Brown |
Blue |
Orange |
Total |
1x7 |
6x7 |
7x7 |
|
4x6 |
3x6 |
|
7 u |
24 u |
18 u |
49 u |
The total number of orange and blue erasers is the combined repeated identity.
Make the total number orange and blue erasers the same.
LCM of 6 and 7 = 42
Blue : Brown
24 : 7
Answer(s): 24 : 7