There were some pencils in Bag L and Bag M. After Oscar transferred
13 of the pencils from Bag L to Bag M, the ratio of the number of pencils in Bag L to that in Bag M changed to 1 : 9. Find the ratio of the numbers of pencils in Bag L to the number of pencils in Bag M at first.
|
Bag L |
Bag M |
Before |
3x1 = 3 u |
17 u |
Change |
- 1x1 = - 1 u |
+ 1 u |
After |
2x1 = 2 u |
|
Comparing Bag L and Bag M in the end |
1x2 = 2 u |
9x2 = 18 u |
The number of pencils in Bag L in the end is repeated. Make the number of pencils in Bag L in the end the same. LCM of 2 and 1 is 2.
At first
Bag L : Bag M
3 : 17
Answer(s): 3 : 17