PSLE A bag contains coins of three different colours.
15 of the coins are yellow. The ratio of the number of green coins to that of red coins is 1 : 9. What is the ratio of the number of green coins to that of yellow coins?
Yellow |
Green |
Red |
Total |
1x5 |
4x5 |
5x5 |
|
1x2 |
9x2 |
|
5 u |
2 u |
18 u |
25 u |
The total number of red and green coins is the combined repeated identity.
Make the total number red and green coins the same.
LCM of 4 and 10 = 20
Green : Yellow
2 : 5
Answer(s): 2 : 5