There are 6 tennis players and each week for a month (4 weeks) a different pair of 5 play a tennis match. How many ways are there to form the sequence of 4 matches so that every player plays at least once?(adsbygoogle = window.adsbygoogle || []).push({});

I believe this is an OR problem, but I don't know how to handle the 4 weeks information and how do you count this?

thanks

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# Homework Help: Combinatorics problem

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