There were some pens in Bag C and Bag D. After Luis transferred
23 of the pens from Bag C to Bag D, the ratio of the number of pens in Bag C to that in Bag D changed to 3 : 8. Find the ratio of the numbers of pens in Bag C to the number of pens in Bag D at first.
|
Bag C |
Bag D |
Before |
3x3 = 9 u |
2 u |
Change |
- 2x3 = - 6 u |
+ 6 u |
After |
1x3 = 3 u |
|
Comparing Bag C and Bag D in the end |
3x1 = 3 u |
8x1 = 8 u |
The number of pens in Bag C in the end is repeated. Make the number of pens in Bag C in the end the same. LCM of 1 and 3 is 3.
At first
Bag C : Bag D
9 : 2
Answer(s): 9 : 2