There were some marbles in Bag A and Bag B. After Harry transferred
13 of the marbles from Bag A to Bag B, the ratio of the number of marbles in Bag A to that in Bag B changed to 3 : 5. Find the ratio of the numbers of marbles in Bag B to the number of marbles in Bag A at first.
|
Bag A |
Bag B |
Before |
3x3 = 9 u |
7 u |
Change |
- 1x3 = - 3 u |
+ 3 u |
After |
2x3 = 6 u |
|
Comparing Bag A and Bag B in the end |
3x2 = 6 u |
5x2 = 10 u |
The number of marbles in Bag A in the end is repeated. Make the number of marbles in Bag A in the end the same. LCM of 2 and 3 is 6.
At first
Bag B : Bag A
7: 9
Answer(s): 7: 9