PSLE A bag contains beads of three different colours.
15 of the beads are blue. The ratio of the number of purple beads to that of brown beads is 2 : 1. What is the ratio of the number of blue beads to that of brown beads?
Blue |
Purple |
Brown |
Total |
1x3 |
4x3 |
5x3 |
|
2x4 |
1x4 |
|
3 u |
8 u |
4 u |
15 u |
The total number of brown and purple beads is the combined repeated identity.
Make the total number brown and purple beads the same.
LCM of 4 and 3 = 12
Blue : Brown
3 : 4
Answer(s): 3 : 4