A man has a certain number of friends; he wants to invite three of them for dinner every day of the year. How many frien
Posted: Mon Nov 15, 2021 9:56 am
A man has a certain number of friends; he wants to invite three
of them for dinner every day of the year. How many friends must he
have at least if he does not want to invite the same three friends
twice?
of them for dinner every day of the year. How many friends must he
have at least if he does not want to invite the same three friends
twice?