PSLE A bag contains coins of three different colours.
15 of the coins are brown. The ratio of the number of yellow coins to that of green coins is 7 : 3. What is the ratio of the number of brown coins to that of green coins?
Brown |
Yellow |
Green |
Total |
1x5 |
4x5 |
5x5 |
|
7x2 |
3x2 |
|
5 u |
14 u |
6 u |
25 u |
The total number of green and yellow coins is the combined repeated identity.
Make the total number green and yellow coins the same.
LCM of 4 and 10 = 20
Brown : Green
5 : 6
Answer(s): 5 : 6