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