1. Give formula for calculating total number of matches in league tournament.
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Explanation:
Number of matches in a league = 0.5n(n-1)
Of course, if we are in a league where every team plays each other twice, we can just multiply this number by 2. If they play each other 3 times then we can multiply by 3, and so on
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Number of boring 0•5 (n-2)*180 = 640
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