SOLUTION: how many committee of five with a given chairman can be selected from twelve persons

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Question 919669: how many committee of five with a given chairman can be selected from twelve persons
Answer by Edwin McCravy(20055) About Me  (Show Source):
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how many committee of five with a given chairman can be selected from twelve persons 
We can choose the committee any of C(12,5) ways.  For each of
those ways we can choose the committee-member to be the chairman
in any of 5 ways.

Answer 5*C(12,5) = 5*792 = 3960 ways.

Edwin