PSLE A bag contains marbles of three different colours.
15 of the marbles are yellow. The ratio of the number of red marbles to that of orange marbles is 1 : 7. What is the ratio of the number of red marbles to that of yellow marbles?
Yellow |
Red |
Orange |
Total |
1x2 |
4x2 |
5x2 |
|
1x1 |
7x1 |
|
2 u |
1 u |
7 u |
10 u |
The total number of orange and red marbles is the combined repeated identity.
Make the total number orange and red marbles the same.
LCM of 4 and 8 = 8
Red : Yellow
1 : 2
Answer(s): 1 : 2