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 green coins is 7 : 2. What is the ratio of the number of yellow coins to that of green coins?
Yellow |
Brown |
Green |
Total |
1x9 |
2x9 |
3x9 |
|
7x2 |
2x2 |
|
9 u |
14 u |
4 u |
27 u |
The total number of green and brown coins is the combined repeated identity.
Make the total number green and brown coins the same.
LCM of 2 and 9 = 18
Yellow : Green
9 : 4
Answer(s): 9 : 4