PSLE A bag contains beads of three different colours.
13 of the beads are blue. The ratio of the number of red beads to that of orange beads is 1 : 7. What is the ratio of the number of blue beads to that of orange beads?
Blue |
Red |
Orange |
Total |
1x4 |
2x4 |
3x4 |
|
1x1 |
7x1 |
|
4 u |
1 u |
7 u |
12 u |
The total number of orange and red beads is the combined repeated identity.
Make the total number orange and red beads the same.
LCM of 2 and 8 = 8
Blue : Orange
4 : 7
Answer(s): 4 : 7