PSLE A bag contains cards of three different colours.
13 of the cards are purple. The ratio of the number of blue cards to that of green cards is 9 : 1. What is the ratio of the number of blue cards to that of purple cards?
Purple |
Blue |
Green |
Total |
1x5 |
2x5 |
3x5 |
|
9x1 |
1x1 |
|
5 u |
9 u |
1 u |
15 u |
The total number of green and blue cards is the combined repeated identity.
Make the total number green and blue cards the same.
LCM of 2 and 10 = 10
Blue : Purple
9 : 5
Answer(s): 9 : 5