PSLE A bag contains stickers of three different colours.
16 of the stickers are blue. The ratio of the number of red stickers to that of brown stickers is 3 : 4. What is the ratio of the number of blue stickers to that of brown stickers?
Blue |
Red |
Brown |
Total |
1x7 |
5x7 |
6x7 |
|
3x5 |
4x5 |
|
7 u |
15 u |
20 u |
42 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 5 and 7 = 35
Blue : Brown
7 : 20
Answer(s): 7 : 20