PSLE A bag contains marbles of three different colours.
16 of the marbles are purple. The ratio of the number of red marbles to that of green marbles is 1 : 3. What is the ratio of the number of purple marbles to that of green marbles?
Purple |
Red |
Green |
Total |
1x4 |
5x4 |
6x4 |
|
1x5 |
3x5 |
|
4 u |
5 u |
15 u |
24 u |
The total number of green and red marbles is the combined repeated identity.
Make the total number green and red marbles the same.
LCM of 5 and 4 = 20
Purple : Green
4 : 15
Answer(s): 4 : 15