PSLE A bag contains cards of three different colours.
16 of the cards are blue. The ratio of the number of orange cards to that of green cards is 4 : 3. What is the ratio of the number of blue cards to that of green cards?
Blue |
Orange |
Green |
Total |
1x7 |
5x7 |
6x7 |
|
4x5 |
3x5 |
|
7 u |
20 u |
15 u |
42 u |
The total number of green and orange cards is the combined repeated identity.
Make the total number green and orange cards the same.
LCM of 5 and 7 = 35
Blue : Green
7 : 15
Answer(s): 7 : 15