PSLE A bag contains cards of three different colours.
110 of the cards are purple. The ratio of the number of blue cards to that of orange cards is 1 : 2. What is the ratio of the number of purple cards to that of orange cards?
Purple |
Blue |
Orange |
Total |
1x1 |
9x1 |
10x1 |
|
1x3 |
2x3 |
|
1 u |
3 u |
6 u |
10 u |
The total number of orange and blue cards is the combined repeated identity.
Make the total number orange and blue cards the same.
LCM of 9 and 3 = 9
Purple : Orange
1 : 6
Answer(s): 1 : 6