SOLUTION: How many ordered lists are there of five items chosen from nine?

Question 1147553: How many ordered lists are there of five items chosen from nine?
Found 2 solutions by greenestamps, ikleyn:
Answer by greenestamps(13200)   (Show Source): You can put this solution on YOUR website!

9 choices for the first item in the list; and
8 choices for the second item in the list; and
7 choices for the third item in the list; etc.

ANSWER: 9*8*7*6*5 = 15120

Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

This problem is "on permutations".

On Permutations, see introductory lessons
    - Introduction to Permutations
    - PROOF of the formula on the number of Permutations
    - Problems on Permutations

    - OVERVIEW of lessons on Permutations and Combinations
in this site.

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

The referred lessons are 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.

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