PSLE A bag contains beads of three different colours.
18 of the beads are green. The ratio of the number of red beads to that of purple beads is 1 : 4. What is the ratio of the number of green beads to that of purple beads?
Green |
Red |
Purple |
Total |
1x5 |
7x5 |
8x5 |
|
1x7 |
4x7 |
|
5 u |
7 u |
28 u |
40 u |
The total number of purple and red beads is the combined repeated identity.
Make the total number purple and red beads the same.
LCM of 7 and 5 = 35
Green : Purple
5 : 28
Answer(s): 5 : 28