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