PSLE A bag contains coins of three different colours.
14 of the coins are orange. The ratio of the number of red coins to that of brown coins is 1 : 9. What is the ratio of the number of red coins to that of orange coins?
Orange |
Red |
Brown |
Total |
1x10 |
3x10 |
4x10 |
|
1x3 |
9x3 |
|
10 u |
3 u |
27 u |
40 u |
The total number of brown and red coins is the combined repeated identity.
Make the total number brown and red coins the same.
LCM of 3 and 10 = 30
Red : Orange
3 : 10
Answer(s): 3 : 10