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 yellow cards is 4 : 5. What is the ratio of the number of brown cards to that of yellow cards?
Brown |
Green |
Yellow |
Total |
1x9 |
1x9 |
2x9 |
|
4x1 |
5x1 |
|
9 u |
4 u |
5 u |
18 u |
The total number of yellow and green cards is the combined repeated identity.
Make the total number yellow and green cards the same.
LCM of 1 and 9 = 9
Brown : Yellow
9 : 5
Answer(s): 9 : 5