There were some marbles in Packet K and Packet L. After Warren transferred
25 of the marbles from Packet K to Packet L, the ratio of the number of marbles in Packet K to that in Packet L changed to 2 : 5. Find the ratio of the numbers of marbles in Packet K to the number of marbles in Packet L at first.
|
Packet K |
Packet L |
Before |
5x2 = 10 u |
11 u |
Change |
- 2x2 = - 4 u |
+ 4 u |
After |
3x2 = 6 u |
|
Comparing Packet K and Packet L in the end |
2x3 = 6 u |
5x3 = 15 u |
The number of marbles in Packet K in the end is repeated. Make the number of marbles in Packet K in the end the same. LCM of 3 and 2 is 6.
At first
Packet K : Packet L
10 : 11
Answer(s): 10 : 11