PSLE A bag contains cards of three different colours.
15 of the cards are green. The ratio of the number of red cards to that of yellow cards is 7 : 3. What is the ratio of the number of green cards to that of yellow cards?
Green |
Red |
Yellow |
Total |
1x5 |
4x5 |
5x5 |
|
7x2 |
3x2 |
|
5 u |
14 u |
6 u |
25 u |
The total number of yellow and red cards is the combined repeated identity.
Make the total number yellow and red cards the same.
LCM of 4 and 10 = 20
Green : Yellow
5 : 6
Answer(s): 5 : 6