PSLE A bag contains marbles of three different colours.
15 of the marbles are yellow. The ratio of the number of orange marbles to that of red marbles is 1 : 5. What is the ratio of the number of orange marbles to that of yellow marbles?
Yellow |
Orange |
Red |
Total |
1x3 |
4x3 |
5x3 |
|
1x2 |
5x2 |
|
3 u |
2 u |
10 u |
15 u |
The total number of red and orange marbles is the combined repeated identity.
Make the total number red and orange marbles the same.
LCM of 4 and 6 = 12
Orange : Yellow
2 : 3
Answer(s): 2 : 3