How many tributes were in the 50 hunger games?

There were 100 tributes in each Hunger Games.

This is because each of the 12 districts sent two tributes (one boy and one girl), totaling 24 tributes. Plus, the Capitol also sent two tributes, bringing the total to 26 tributes per Hunger Games.

Since there were 50 Hunger Games, the total number of tributes would be 26 * 50 = 1300.