Question 1191220
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The wording of "middle" is unfortunately vague. 


If your teacher means the <u>exact middle</u>, then we'd have 2 novels on one side of the dictionary and 2 novels on the other side.


Concerning the novels only for now, there are 4 slots to fill and 11 novels to pick from.


Use n = 11 and r = 4 to plug into the nPr formula.
n P r = (n!)/( (n-r)! )
11 P 4 = (11!)/( (11-4)! )
11 P 4 = (11!)/( 7! )
11 P 4 = (11*10*9*8*7!)/( 7! )
11 P 4 = 11*10*9*8
11 P 4 = 7920
There are 7920 ways to arrange the 4 novels from a total collection of 11 novels. 
This is if your teacher considers the order mattering.
This applies to one dictionary. But we have 3 of them, so 3*7920 = 23,760


Answer: <font color=red>23,760</font>
This of course only applies if the dictionary is right in the exact middle. Also, it involves the order mattering.
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