To determine how many people in the country are unemployed, we need to focus on the individuals who are actively looking for work but are not currently employed.
In the scenario you provided:
- Children: 50 (not considered in the labor force)
- Adults working: 125
- Adults not working but looking for a job: 25 (these are the unemployed)
- Adults who don’t want to work: 75 (not considered unemployed)
- Retired people: 100 (not considered in the labor force)
The unemployed population is represented by the adults who are not working but are looking for a job, which is 25.
Therefore, the answer is 25.