Sports Problems: Problem 1

Problem: (1) Four classes are having a soccer tournament. If there has to be one competition between every two classes, how many rounds does each class participate in? How many rounds are there in all?

(2) A group of towns are having a softball tournament. There are 5 towns, and each town has 2 teams. Every team has to play all the other teams one time, and these competitions are held at 5 different softball fields. On average, how many competitions will be held at each softball field?

Key: Use formulas

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