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Help 1,2,3

 
NotSoSmart  Apr 16, 2018
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 #1
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3. 7C6= 7!/6! * 1!= 7/1=7, so the last option.

 
tertre  Apr 16, 2018
 #2
avatar+85742 
+2

1.    3 routes from school to library * 5 routes from library to home  =   15

 

2.  Possible ways that Verne can line up his books = 6!  = 720

     Possible ways that  Jenny can line up her books  = 4!  = 24

 

720  -  24     =    696

 

 

 

cool cool cool

 
CPhill  Apr 16, 2018

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