PSLE A bag contains coins of three different colours.
17 of the coins are orange. The ratio of the number of red coins to that of yellow coins is 7 : 2. What is the ratio of the number of orange coins to that of yellow coins?
Orange |
Red |
Yellow |
Total |
1x3 |
6x3 |
7x3 |
|
7x2 |
2x2 |
|
3 u |
14 u |
4 u |
21 u |
The total number of yellow and red coins is the combined repeated identity.
Make the total number yellow and red coins the same.
LCM of 6 and 9 = 18
Orange : Yellow
3 : 4
Answer(s): 3 : 4