PSLE A bag contains coins of three different colours.
18 of the coins are orange. The ratio of the number of green coins to that of blue coins is 3 : 1. What is the ratio of the number of green coins to that of orange coins?
Orange |
Green |
Blue |
Total |
1x4 |
7x4 |
8x4 |
|
3x7 |
1x7 |
|
4 u |
21 u |
7 u |
32 u |
The total number of blue and green coins is the combined repeated identity.
Make the total number blue and green coins the same.
LCM of 7 and 4 = 28
Green : Orange
21 : 4
Answer(s): 21 : 4