PSLE A bag contains marbles of three different colours.
13 of the marbles are purple. The ratio of the number of red marbles to that of brown marbles is 3 : 2. What is the ratio of the number of purple marbles to that of brown marbles?
Purple |
Red |
Brown |
Total |
1x5 |
2x5 |
3x5 |
|
3x2 |
2x2 |
|
5 u |
6 u |
4 u |
15 u |
The total number of brown and red marbles is the combined repeated identity.
Make the total number brown and red marbles the same.
LCM of 2 and 5 = 10
Purple : Brown
5 : 4
Answer(s): 5 : 4