PSLE A bag contains coins of three different colours.
14 of the coins are purple. The ratio of the number of green coins to that of red coins is 3 : 5. What is the ratio of the number of purple coins to that of red coins?
Purple |
Green |
Red |
Total |
1x8 |
3x8 |
4x8 |
|
3x3 |
5x3 |
|
8 u |
9 u |
15 u |
32 u |
The total number of red and green coins is the combined repeated identity.
Make the total number red and green coins the same.
LCM of 3 and 8 = 24
Purple : Red
8 : 15
Answer(s): 8 : 15