SOLUTION: From a group of 9 different books, 5 books are selected and arranged on a shelf. How many arrangements are possible?

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Question 1191508: From a group of 9 different books, 5 books are selected and arranged on a shelf. How many arrangements are possible?
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
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ANSWER.             9*8*7*6*5 = 15120   different arrangements.


            The product of 5 consecutive integer numbers in the descending order, starting from 9.


Explanation 

Any of 9 books in the first position.

Any of remaining 8 books in the next position.

   . . . and so on . . .

Solved and explained.

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See the lesson
    - Special type permutations problems

in this site. Find there many solved similar problems.

Also,  you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lesson is the part of this online textbook under the topic  "Combinatorics: Combinations and permutations".


Save the link to this textbook together with its description

Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

into your archive and use when it is needed.