PSLE A bag contains cards of three different colours.
13 of the cards are orange. The ratio of the number of purple cards to that of yellow cards is 7 : 3. What is the ratio of the number of purple cards to that of orange cards?
Orange |
Purple |
Yellow |
Total |
1x5 |
2x5 |
3x5 |
|
7x1 |
3x1 |
|
5 u |
7 u |
3 u |
15 u |
The total number of yellow and purple cards is the combined repeated identity.
Make the total number yellow and purple cards the same.
LCM of 2 and 10 = 10
Purple : Orange
7 : 5
Answer(s): 7 : 5