Answer:
5 teams
Explanation:
Given : Joe's softball team was in a tournament.
If a team lost one game they were eliminated.
His team won the tournament, defeating four other teams.
To Find: How many teams were entered in the tournament?
Solution:
Let Team B be the Joe's softball team
Since we are given that His team won the tournament, defeating four other teams.
Team B played first match with Team A
So, Team B won the match.
So, Team A got eliminated.
So, Team B defeated the one team.
Now , Team B played match with Team C
So, Team B won the match.
So, Team C got eliminated.
So, Team B defeated the two teams.
Now , Team B played match with Team D
So, Team B won the match.
So, Team D got eliminated.
So, Team B defeated the three teams.
Now , Team B played match with Team E
So, Team B won the match.
So, Team E got eliminated.
So, Team B defeated the four teams.
Thus there are total five teams : Team A , Team B , Team C , Team D and Team E .