PSLE A bag contains marbles of three different colours.
15 of the marbles are blue. The ratio of the number of yellow marbles to that of brown marbles is 5 : 4. What is the ratio of the number of yellow marbles to that of blue marbles?
Blue |
Yellow |
Brown |
Total |
1x9 |
4x9 |
5x9 |
|
5x4 |
4x4 |
|
9 u |
20 u |
16 u |
45 u |
The total number of brown and yellow marbles is the combined repeated identity.
Make the total number brown and yellow marbles the same.
LCM of 4 and 9 = 36
Yellow : Blue
20 : 9
Answer(s): 20 : 9