SOLUTION: In how many ways can 7 different book be arrange on a shelf such that the specificed book be at either end

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Question 1095144: In how many ways can 7 different book be arrange on a shelf such that the specificed book be at either end
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
For 6 of the books,
+6%2A5%2A4%2A3%2A2%2A1+=+720+
There will be+720+ with 7th book at one end
and another +720+ with 7th book at other end
+2%2A720+=+1440+ arrangements