How can you arrange 6 books in a shelf?

Question

Just wondering how you can find out how to arrange 6 books in a shelf?

Answer 1

Like in a library?  It depends on the genre.

If they're nonfiction, look at the Dewey Decimal system.

If they're fiction, alphabetical order by author's last name.

Answer 2

Books are arranged by either alphabetical order or numerical such as forms of libraries.. You have 6 choices for first position, then five for second position, then 4 for etc...So the answer is 6 x 5 x 4 x 3 x 2 x 1 = 720

Answer 3

6! or 6 factorial

6! = 6 * 5 * 4 * 3 * 2 * 1 = 720 different ways.

Here's a short tutorial on the subject of combinations and permutations:

http://www.mathsisfun.com/combinatorics/...

Good luck in your studies,

~ Mitch ~