Question 1193209
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We start at 6 and count down by 1 until all six slots are full. 
For more information, check out the concept dealing with factorials.
A very closely related topic would be permutations.


6 ways to fill slot A
5 ways to fill slot B
4 ways to fill slot C
3 ways to fill slot D
2 ways to fill slot E
1 way to fill slot F


There are 6*5*4*3*2*1 = 720 ways to fill the six positions where order matters.
Order matters because each position or seat is different from one another.


Answer: 720
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