PSLE A bag contains beads of three different colours.
18 of the beads are red. The ratio of the number of orange beads to that of blue beads is 2 : 1. What is the ratio of the number of red beads to that of blue beads?
Red |
Orange |
Blue |
Total |
1x3 |
7x3 |
8x3 |
|
2x7 |
1x7 |
|
3 u |
14 u |
7 u |
24 u |
The total number of blue and orange beads is the combined repeated identity.
Make the total number blue and orange beads the same.
LCM of 7 and 3 = 21
Red : Blue
3 : 7
Answer(s): 3 : 7