SOLUTION: how do i compute and show my work for 9C3 and 9P3

Question 1096086: how do i compute and show my work for 9C3 and 9P3

Answer by ikleyn(52802) (Show Source): You can put this solution on YOUR website!
.

9C3 =  =  =  =  = 3*4*7 = 84.


It is the number of combinations of 9 items taken 3 at a time.




9P3 = 9*8*7 = 504.


It is the number of PLACEMENTS of 9 items taken 3 at a time.

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