PSLE A bag contains coins of three different colours.
16 of the coins are red. The ratio of the number of purple coins to that of green coins is 5 : 2. What is the ratio of the number of purple coins to that of red coins?
Red |
Purple |
Green |
Total |
1x7 |
5x7 |
6x7 |
|
5x5 |
2x5 |
|
7 u |
25 u |
10 u |
42 u |
The total number of green and purple coins is the combined repeated identity.
Make the total number green and purple coins the same.
LCM of 5 and 7 = 35
Purple : Red
25 : 7
Answer(s): 25 : 7