Mathematics, 18.08.2020 15:01 1940swannabe

(a) Five friends are in a netball squad. In each game during the 21-round season, at least 3 of them are picked in the team. Prove that there will be at least 3 matches in which the same three friends are selected to play. (b) How does the answer change if there are six friends instead of 5?
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(a) Five friends are in a netball squad. In each game during the 21-round season, at least 3 of them...