PSLE A bag contains coins of three different colours.
12 of the coins are purple. The ratio of the number of orange coins to that of red coins is 7 : 1. What is the ratio of the number of purple coins to that of red coins?
Purple |
Orange |
Red |
Total |
1x8 |
1x8 |
2x8 |
|
7x1 |
1x1 |
|
8 u |
7 u |
1 u |
16 u |
The total number of red and orange coins is the combined repeated identity.
Make the total number red and orange coins the same.
LCM of 1 and 8 = 8
Purple : Red
8 : 1
Answer(s): 8 : 1