PSLE A bag contains coins of three different colours.
13 of the coins are purple. The ratio of the number of red coins to that of yellow coins is 1 : 2. What is the ratio of the number of red coins to that of purple coins?
Purple |
Red |
Yellow |
Total |
1x3 |
2x3 |
3x3 |
|
1x2 |
2x2 |
|
3 u |
2 u |
4 u |
9 u |
The total number of yellow and red coins is the combined repeated identity.
Make the total number yellow and red coins the same.
LCM of 2 and 3 = 6
Red : Purple
2 : 3
Answer(s): 2 : 3