PSLE A bag contains marbles of three different colours.
19 of the marbles are green. The ratio of the number of yellow marbles to that of red marbles is 7 : 3. What is the ratio of the number of yellow marbles to that of green marbles?
Green |
Yellow |
Red |
Total |
1x5 |
8x5 |
9x5 |
|
7x4 |
3x4 |
|
5 u |
28 u |
12 u |
45 u |
The total number of red and yellow marbles is the combined repeated identity.
Make the total number red and yellow marbles the same.
LCM of 8 and 10 = 40
Yellow : Green
28 : 5
Answer(s): 28 : 5