PSLE A bag contains marbles of three different colours.
13 of the marbles are yellow. The ratio of the number of brown marbles to that of purple marbles is 1 : 3. What is the ratio of the number of brown marbles to that of yellow marbles?
Yellow |
Brown |
Purple |
Total |
1x2 |
2x2 |
3x2 |
|
1x1 |
3x1 |
|
2 u |
1 u |
3 u |
6 u |
The total number of purple and brown marbles is the combined repeated identity.
Make the total number purple and brown marbles the same.
LCM of 2 and 4 = 4
Brown : Yellow
1 : 2
Answer(s): 1 : 2