PSLE A bag contains cards of three different colours.
14 of the cards are purple. The ratio of the number of red cards to that of orange cards is 6 : 1. What is the ratio of the number of red cards to that of purple cards?
Purple |
Red |
Orange |
Total |
1x7 |
3x7 |
4x7 |
|
6x3 |
1x3 |
|
7 u |
18 u |
3 u |
28 u |
The total number of orange and red cards is the combined repeated identity.
Make the total number orange and red cards the same.
LCM of 3 and 7 = 21
Red : Purple
18 : 7
Answer(s): 18 : 7