PSLE A bag contains cards of three different colours.
15 of the cards are red. The ratio of the number of yellow cards to that of green cards is 6 : 1. What is the ratio of the number of red cards to that of green cards?
Red |
Yellow |
Green |
Total |
1x7 |
4x7 |
5x7 |
|
6x4 |
1x4 |
|
7 u |
24 u |
4 u |
35 u |
The total number of green and yellow cards is the combined repeated identity.
Make the total number green and yellow cards the same.
LCM of 4 and 7 = 28
Red : Green
7 : 4
Answer(s): 7 : 4