There were some marbles in Bag S and Bag T. After Tim transferred
25 of the marbles from Bag S to Bag T, the ratio of the number of marbles in Bag S to that in Bag T changed to 1 : 5. Find the ratio of the numbers of marbles in Bag S to the number of marbles in Bag T at first.
|
Bag S |
Bag T |
Before |
5x1 = 5 u |
13 u |
Change |
- 2x1 = - 2 u |
+ 2 u |
After |
3x1 = 3 u |
|
Comparing Bag S and Bag T in the end |
1x3 = 3 u |
5x3 = 15 u |
The number of marbles in Bag S in the end is repeated. Make the number of marbles in Bag S in the end the same. LCM of 3 and 1 is 3.
At first
Bag S : Bag T
5 : 13
Answer(s): 5 : 13