PSLE A bag contains cards of three different colours.
15 of the cards are brown. The ratio of the number of purple cards to that of blue cards is 1 : 2. What is the ratio of the number of brown cards to that of blue cards?
Brown |
Purple |
Blue |
Total |
1x3 |
4x3 |
5x3 |
|
1x4 |
2x4 |
|
3 u |
4 u |
8 u |
15 u |
The total number of blue and purple cards is the combined repeated identity.
Make the total number blue and purple cards the same.
LCM of 4 and 3 = 12
Brown : Blue
3 : 8
Answer(s): 3 : 8