PSLE A bag contains erasers of three different colours.
19 of the erasers are purple. The ratio of the number of yellow erasers to that of blue erasers is 1 : 2. What is the ratio of the number of purple erasers to that of blue erasers?
Purple |
Yellow |
Blue |
Total |
1x3 |
8x3 |
9x3 |
|
1x8 |
2x8 |
|
3 u |
8 u |
16 u |
27 u |
The total number of blue and yellow erasers is the combined repeated identity.
Make the total number blue and yellow erasers the same.
LCM of 8 and 3 = 24
Purple : Blue
3 : 16
Answer(s): 3 : 16