26 campers went rowing and 25 campers went hiking in the morning. 49 campers went rowing in the afternoon. How many campers went rowing and hiking in all?
In the morning, 
- 26 campers went rowing 
- 25 campers went hiking 
That means that in the morning, 
- 1 camper went rowing and hiking 
In the afternoon, 
- 49 campers went rowing 
That means that in the afternoon, 
- 24 campers went rowing and hiking 
In all, 
- 25 campers went rowing and hiking