Tournament match calculation

The long-term volleyball tournament is played one-on-one. So far, 11 teams have entered the competition. How many matches will be lost when two teams unsubscribe?

Final Answer:

x =  19

Step-by-step explanation:

C2(9)=(29)=2!(92)!9!=2198=36 C2(11)=(211)=2!(112)!11!=211110=55  n1=(211)=55 n2=(2112)=36  x=n1n2=5536=19



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