PSLE A bag contains coins of three different colours.
17 of the coins are purple. The ratio of the number of green coins to that of blue coins is 5 : 4. What is the ratio of the number of purple coins to that of blue coins?
Purple |
Green |
Blue |
Total |
1x3 |
6x3 |
7x3 |
|
5x2 |
4x2 |
|
3 u |
10 u |
8 u |
21 u |
The total number of blue and green coins is the combined repeated identity.
Make the total number blue and green coins the same.
LCM of 6 and 9 = 18
Purple : Blue
3 : 8
Answer(s): 3 : 8