PSLE A bag contains cards of three different colours.
18 of the cards are brown. The ratio of the number of red cards to that of green cards is 1 : 1. What is the ratio of the number of red cards to that of brown cards?
Brown |
Red |
Green |
Total |
1x2 |
7x2 |
8x2 |
|
1x7 |
1x7 |
|
2 u |
7 u |
7 u |
16 u |
The total number of green and red cards is the combined repeated identity.
Make the total number green and red cards the same.
LCM of 7 and 2 = 14
Red : Brown
7 : 2
Answer(s): 7 : 2