PSLE A bag contains coins of three different colours.
17 of the coins are yellow. The ratio of the number of red coins to that of purple coins is 2 : 3. What is the ratio of the number of red coins to that of yellow coins?
Yellow |
Red |
Purple |
Total |
1x5 |
6x5 |
7x5 |
|
2x6 |
3x6 |
|
5 u |
12 u |
18 u |
35 u |
The total number of purple and red coins is the combined repeated identity.
Make the total number purple and red coins the same.
LCM of 6 and 5 = 30
Red : Yellow
12 : 5
Answer(s): 12 : 5