Question 1092441
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Notice, that the order of people (who is selected to which position) is important in this problem, 

        and different orders define different selections.


Therefore, the answer is:  in 7*6*5 = 210 ways.


Anyone of 7               to the first position.

Anyone of the remaining 6 to the second position.

Anyone of the remaining 5 to the third position.
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