PSLE A bag contains coins of three different colours.
17 of the coins are brown. The ratio of the number of orange coins to that of green coins is 3 : 7. What is the ratio of the number of brown coins to that of green coins?
Brown |
Orange |
Green |
Total |
1x5 |
6x5 |
7x5 |
|
3x3 |
7x3 |
|
5 u |
9 u |
21 u |
35 u |
The total number of green and orange coins is the combined repeated identity.
Make the total number green and orange coins the same.
LCM of 6 and 10 = 30
Brown : Green
5 : 21
Answer(s): 5 : 21