PSLE A bag contains coins of three different colours.
110 of the coins are purple. The ratio of the number of blue coins to that of brown coins is 1 : 3. What is the ratio of the number of blue coins to that of purple coins?
Purple |
Blue |
Brown |
Total |
1x4 |
9x4 |
10x4 |
|
1x9 |
3x9 |
|
4 u |
9 u |
27 u |
40 u |
The total number of brown and blue coins is the combined repeated identity.
Make the total number brown and blue coins the same.
LCM of 9 and 4 = 36
Blue : Purple
9 : 4
Answer(s): 9 : 4