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18 teams, 5 of which are professional, take part in a football tournament. At the beginning...

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Statistics

18 teams, 5 of which are professional, take part in a footballtournament. At the beginning of the tournament the 18 teams arerandomly divided into two groups (A and B) of 9 teams each.Determine the probabilities of the following events:

a) all professional teams end up in one group

b) 2 of the professional teams are in one group and the other 3professional teams are in the other group

Answer & Explanation Solved by verified expert
4.2 Ratings (585 Votes)
Let the 5 professional team be considered a one block only So total no of teams now left 131 14 Now all these teams can be placed in any of the two groups except the last team which will have no option but to join one group    See Answer
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