PSLE A bag contains coins of three different colours.
12 of the coins are red. The ratio of the number of purple coins to that of green coins is 1 : 8. What is the ratio of the number of purple coins to that of red coins?
Red |
Purple |
Green |
Total |
1x9 |
1x9 |
2x9 |
|
1x1 |
8x1 |
|
9 u |
1 u |
8 u |
18 u |
The total number of green and purple coins is the combined repeated identity.
Make the total number green and purple coins the same.
LCM of 1 and 9 = 9
Purple : Red
1 : 9
Answer(s): 1 : 9