PSLE A bag contains marbles of three different colours.
16 of the marbles are orange. The ratio of the number of blue marbles to that of red marbles is 2 : 1. What is the ratio of the number of orange marbles to that of red marbles?
Orange |
Blue |
Red |
Total |
1x3 |
5x3 |
6x3 |
|
2x5 |
1x5 |
|
3 u |
10 u |
5 u |
18 u |
The total number of red and blue marbles is the combined repeated identity.
Make the total number red and blue marbles the same.
LCM of 5 and 3 = 15
Orange : Red
3 : 5
Answer(s): 3 : 5