PSLE A bag contains marbles of three different colours.
15 of the marbles are brown. The ratio of the number of green marbles to that of blue marbles is 1 : 4. What is the ratio of the number of brown marbles to that of blue marbles?
Brown |
Green |
Blue |
Total |
1x5 |
4x5 |
5x5 |
|
1x4 |
4x4 |
|
5 u |
4 u |
16 u |
25 u |
The total number of blue and green marbles is the combined repeated identity.
Make the total number blue and green marbles the same.
LCM of 4 and 5 = 20
Brown : Blue
5 : 16
Answer(s): 5 : 16