Four. One in the center, two assistant referees, and one fourth official.
players, match officials, Referees, assistant referees, stewards
Three, a center and two assistants. Possibly four if there is a fourth official on the sideline.
There are 7 referees in a game.
4 feferees. The main referee, two line referees, and the 4th referee who controls the board for substitutions.
3 referees are in soccer and football
as a minium 1 referee and 2 assistant referees.
Football because in every professional match you need two referees of different cultures to the teams playing each other on that day.
there is usually 3 referees in highschool and college im not sure about the nba