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Mr. Reader has six different Spiderman comic books, five different Archie comic books and four different Garfield comic books. When stacked, all of the Spiderman comic books are grouped together, all of the Archie comic books are grouped together and all of the Garfield comic books are grouped together. In how many different orders can these 15 comic books be stacked in a pile with the covers facing up and all of them facing the same direction? Express your answer as a whole number.

 Jun 1, 2018
 #1
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3! 6! 5! 4!

 Jun 1, 2018
 #2
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what do the factorials mean?  (do you add, multiply, divide, or subtract them?)

Guest Jun 1, 2018
 #3
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6! means   1*2*3*4*5*6

 

that are all multiply signs  :)

 

It is really good that you asked   laugh

Melody  Jun 1, 2018
edited by Melody  Jun 1, 2018

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