PSLE A bag contains marbles of three different colours.
13 of the marbles are yellow. The ratio of the number of brown marbles to that of red marbles is 5 : 3. What is the ratio of the number of yellow marbles to that of red marbles?
Yellow |
Brown |
Red |
Total |
1x4 |
2x4 |
3x4 |
|
5x1 |
3x1 |
|
4 u |
5 u |
3 u |
12 u |
The total number of red and brown marbles is the combined repeated identity.
Make the total number red and brown marbles the same.
LCM of 2 and 8 = 8
Yellow : Red
4 : 3
Answer(s): 4 : 3