PSLE A bag contains coins of three different colours.
15 of the coins are brown. The ratio of the number of purple coins to that of green coins is 1 : 1. What is the ratio of the number of brown coins to that of green coins?
Brown |
Purple |
Green |
Total |
1x1 |
4x1 |
5x1 |
|
1x2 |
1x2 |
|
1 u |
2 u |
2 u |
5 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 4 and 2 = 4
Brown : Green
1 : 2
Answer(s): 1 : 2