PSLE A bag contains marbles of three different colours.
18 of the marbles are green. The ratio of the number of orange marbles to that of red marbles is 1 : 1. What is the ratio of the number of orange marbles to that of green marbles?
Green |
Orange |
Red |
Total |
1x2 |
7x2 |
8x2 |
|
1x7 |
1x7 |
|
2 u |
7 u |
7 u |
16 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 7 and 2 = 14
Orange : Green
7 : 2
Answer(s): 7 : 2