PSLE A bag contains stickers of three different colours.
18 of the stickers are blue. The ratio of the number of purple stickers to that of red stickers is 3 : 2. What is the ratio of the number of purple stickers to that of blue stickers?
Blue |
Purple |
Red |
Total |
1x5 |
7x5 |
8x5 |
|
3x7 |
2x7 |
|
5 u |
21 u |
14 u |
40 u |
The total number of red and purple stickers is the combined repeated identity.
Make the total number red and purple stickers the same.
LCM of 7 and 5 = 35
Purple : Blue
21 : 5
Answer(s): 21 : 5