PSLE A bag contains coins of three different colours.
13 of the coins are yellow. The ratio of the number of red coins to that of orange coins is 2 : 7. What is the ratio of the number of yellow coins to that of orange coins?
Yellow |
Red |
Orange |
Total |
1x9 |
2x9 |
3x9 |
|
2x2 |
7x2 |
|
9 u |
4 u |
14 u |
27 u |
The total number of orange and red coins is the combined repeated identity.
Make the total number orange and red coins the same.
LCM of 2 and 9 = 18
Yellow : Orange
9 : 14
Answer(s): 9 : 14