PSLE A bag contains coins of three different colours.
15 of the coins are blue. The ratio of the number of orange coins to that of red coins is 1 : 6. What is the ratio of the number of blue coins to that of red coins?
Blue |
Orange |
Red |
Total |
1x7 |
4x7 |
5x7 |
|
1x4 |
6x4 |
|
7 u |
4 u |
24 u |
35 u |
The total number of red and orange coins is the combined repeated identity.
Make the total number red and orange coins the same.
LCM of 4 and 7 = 28
Blue : Red
7 : 24
Answer(s): 7 : 24