PSLE A bag contains beads of three different colours.
110 of the beads are brown. The ratio of the number of red beads to that of blue beads is 1 : 1. What is the ratio of the number of brown beads to that of blue beads?
Brown |
Red |
Blue |
Total |
1x2 |
9x2 |
10x2 |
|
1x9 |
1x9 |
|
2 u |
9 u |
9 u |
20 u |
The total number of blue and red beads is the combined repeated identity.
Make the total number blue and red beads the same.
LCM of 9 and 2 = 18
Brown : Blue
2 : 9
Answer(s): 2 : 9