PSLE A bag contains cards of three different colours.
12 of the cards are brown. The ratio of the number of green cards to that of red cards is 1 : 2. What is the ratio of the number of brown cards to that of red cards?
Brown |
Green |
Red |
Total |
1x3 |
1x3 |
2x3 |
|
1x1 |
2x1 |
|
3 u |
1 u |
2 u |
6 u |
The total number of red and green cards is the combined repeated identity.
Make the total number red and green cards the same.
LCM of 1 and 3 = 3
Brown : Red
3 : 2
Answer(s): 3 : 2