PSLE A bag contains cards of three different colours.
17 of the cards are red. The ratio of the number of brown cards to that of purple cards is 2 : 3. What is the ratio of the number of red cards to that of purple cards?
Red |
Brown |
Purple |
Total |
1x5 |
6x5 |
7x5 |
|
2x6 |
3x6 |
|
5 u |
12 u |
18 u |
35 u |
The total number of purple and brown cards is the combined repeated identity.
Make the total number purple and brown cards the same.
LCM of 6 and 5 = 30
Red : Purple
5 : 18
Answer(s): 5 : 18