PSLE A bag contains stickers of three different colours.
15 of the stickers are orange. The ratio of the number of red stickers to that of brown stickers is 4 : 5. What is the ratio of the number of orange stickers to that of brown stickers?
Orange |
Red |
Brown |
Total |
1x9 |
4x9 |
5x9 |
|
4x4 |
5x4 |
|
9 u |
16 u |
20 u |
45 u |
The total number of brown and red stickers is the combined repeated identity.
Make the total number brown and red stickers the same.
LCM of 4 and 9 = 36
Orange : Brown
9 : 20
Answer(s): 9 : 20