PSLE A bag contains marbles of three different colours.
13 of the marbles are purple. The ratio of the number of yellow marbles to that of red marbles is 5 : 4. What is the ratio of the number of purple marbles to that of red marbles?
Purple |
Yellow |
Red |
Total |
1x9 |
2x9 |
3x9 |
|
5x2 |
4x2 |
|
9 u |
10 u |
8 u |
27 u |
The total number of red and yellow marbles is the combined repeated identity.
Make the total number red and yellow marbles the same.
LCM of 2 and 9 = 18
Purple : Red
9 : 8
Answer(s): 9 : 8