PSLE A bag contains marbles of three different colours.
15 of the marbles are purple. The ratio of the number of brown marbles to that of blue marbles is 3 : 2. What is the ratio of the number of purple marbles to that of blue marbles?
Purple |
Brown |
Blue |
Total |
1x5 |
4x5 |
5x5 |
|
3x4 |
2x4 |
|
5 u |
12 u |
8 u |
25 u |
The total number of blue and brown marbles is the combined repeated identity.
Make the total number blue and brown marbles the same.
LCM of 4 and 5 = 20
Purple : Blue
5 : 8
Answer(s): 5 : 8