There are 75 stickers in Box D and 75 stickers in Box E.
Some stickers are transferred from Box D to Box E.
Box E has 30 more stickers than Box D.
How many stickers are transferred from Box D to Box E?
|
Box D |
Box E |
Before |
75 |
75 |
Change |
- ? |
+ ? |
After |
1 u |
1 u + 30 |
Total number of stickers
= 75 + 75
= 150
In the end
Total number of stickers = 1 u + 1 u + 30 = 2 u + 30
The total number of stickers at first and in the end remains unchanged.
2 u + 30 = 150
2 u = 150 - 30 = 120
1 u = 120 ÷ 2 = 60
Number of stickers that are transferred from Box D to Box E
= Number of stickers in Box D at first - Number of stickers in Box D in the end
= 75 - 60
= 15
Answer(s): 15