PSLE A bag contains marbles of three different colours.
13 of the marbles are orange. The ratio of the number of green marbles to that of brown marbles is 2 : 5. What is the ratio of the number of orange marbles to that of brown marbles?
Orange |
Green |
Brown |
Total |
1x7 |
2x7 |
3x7 |
|
2x2 |
5x2 |
|
7 u |
4 u |
10 u |
21 u |
The total number of brown and green marbles is the combined repeated identity.
Make the total number brown and green marbles the same.
LCM of 2 and 7 = 14
Orange : Brown
7 : 10
Answer(s): 7 : 10