PSLE A bag contains stickers of three different colours.
14 of the stickers are brown. The ratio of the number of orange stickers to that of red stickers is 3 : 7. What is the ratio of the number of orange stickers to that of brown stickers?
Brown |
Orange |
Red |
Total |
1x10 |
3x10 |
4x10 |
|
3x3 |
7x3 |
|
10 u |
9 u |
21 u |
40 u |
The total number of red and orange stickers is the combined repeated identity.
Make the total number red and orange stickers the same.
LCM of 3 and 10 = 30
Orange : Brown
9 : 10
Answer(s): 9 : 10