PSLE A bag contains cards of three different colours.
12 of the cards are blue. The ratio of the number of purple cards to that of green cards is 3 : 4. What is the ratio of the number of blue cards to that of green cards?
Blue |
Purple |
Green |
Total |
1x7 |
1x7 |
2x7 |
|
3x1 |
4x1 |
|
7 u |
3 u |
4 u |
14 u |
The total number of green and purple cards is the combined repeated identity.
Make the total number green and purple cards the same.
LCM of 1 and 7 = 7
Blue : Green
7 : 4
Answer(s): 7 : 4