PSLE A bag contains coins of three different colours.
15 of the coins are green. The ratio of the number of purple coins to that of blue coins is 3 : 2. What is the ratio of the number of purple coins to that of green coins?
Green |
Purple |
Blue |
Total |
1x5 |
4x5 |
5x5 |
|
3x4 |
2x4 |
|
5 u |
12 u |
8 u |
25 u |
The total number of blue and purple coins is the combined repeated identity.
Make the total number blue and purple coins the same.
LCM of 4 and 5 = 20
Purple : Green
12 : 5
Answer(s): 12 : 5