Answer:
10 teams. 1 person can't play.
Step-by-step explanation:
With 31 people, if each team has 3 players, then they can make 10 teams of 3.
We find this by doing: 31 ÷ 3. (the amount of people total who want to play, divided by the number of people who will be on each team. This gives us the total number of teams if that makes sense.)
31 ÷ 3 = 10.3 (10[tex]\frac{1}{3}[/tex])
However, 1 person cannot play. If you try to add in the "31st" player it'd make 10[tex]\frac{1}{3}[/tex] teams. The question states "and no one can be on more than one team"
Hope this helps and have a nice day!