PSLE A bag contains erasers of three different colours.
18 of the erasers are brown. The ratio of the number of orange erasers to that of purple erasers is 1 : 1. What is the ratio of the number of orange erasers to that of brown erasers?
Brown |
Orange |
Purple |
Total |
1x2 |
7x2 |
8x2 |
|
1x7 |
1x7 |
|
2 u |
7 u |
7 u |
16 u |
The total number of purple and orange erasers is the combined repeated identity.
Make the total number purple and orange erasers the same.
LCM of 7 and 2 = 14
Orange : Brown
7 : 2
Answer(s): 7 : 2