How many matches will be played in a football tournament in which there are two groups of 5 teams if one match is played in groups with each other and the group winners play a match for the tournament's overall winner?

Correct answer:

n =  21

Step-by-step explanation:

C2(5)=(25)=2!(52)!5!=2154=10  n1=(25)=10  n=2 n1+1=2 10+1=21

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