There are 80 stickers in Box N and 75 stickers in Box P.
Some stickers are transferred from Box N to Box P.
Box P has 15 more stickers than Box N.
How many stickers are transferred from Box N to Box P?
|
Box N |
Box P |
Before |
80 |
75 |
Change |
- ? |
+ ? |
After |
1 u |
1 u + 15 |
Total number of stickers
= 80 + 75
= 155
In the end
Total number of stickers = 1 u + 1 u + 15 = 2 u + 15
The total number of stickers at first and in the end remains unchanged.
2 u + 15 = 155
2 u = 155 - 15 = 140
1 u = 140 ÷ 2 = 70
Number of stickers that are transferred from Box N to Box P
= Number of stickers in Box N at first - Number of stickers in Box N in the end
= 80 - 70
= 10
Answer(s): 10