PSLE A bag contains coins of three different colours.
110 of the coins are purple. The ratio of the number of red coins to that of orange coins is 1 : 4. What is the ratio of the number of red coins to that of purple coins?
Purple |
Red |
Orange |
Total |
1x5 |
9x5 |
10x5 |
|
1x9 |
4x9 |
|
5 u |
9 u |
36 u |
50 u |
The total number of orange and red coins is the combined repeated identity.
Make the total number orange and red coins the same.
LCM of 9 and 5 = 45
Red : Purple
9 : 5
Answer(s): 9 : 5