PSLE A bag contains beads of three different colours.
15 of the beads are orange. The ratio of the number of red beads to that of blue beads is 1 : 4. What is the ratio of the number of red beads to that of orange beads?
Orange |
Red |
Blue |
Total |
1x5 |
4x5 |
5x5 |
|
1x4 |
4x4 |
|
5 u |
4 u |
16 u |
25 u |
The total number of blue and red beads is the combined repeated identity.
Make the total number blue and red beads the same.
LCM of 4 and 5 = 20
Red : Orange
4 : 5
Answer(s): 4 : 5