SOLUTION: To choose 6 different numbers from 10 numbers (0-9), how many combinations are there?

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Question 1175243: To choose 6 different numbers from 10 numbers (0-9), how many combinations are there?
Found 2 solutions by ewatrrr, ikleyn:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
choose 6 different numbers from 10 numbers (0-9), 
how many combinations are there?  10C6     nCr = (n!)/(r!(n - r)!).   		

Wish You the Best in your Studies.


Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.

The number of combinations is   C%5B10%5D%5E6 = %2810%2A9%2A8%2A7%29%2F%281%2A2%2A3%2A4%29 = 210.         ANSWER

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On Combinations,  see introductory lessons
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - 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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The answer by @ewatrrr is INCORRECT.

Just for a long time she can not learn the difference between the combinations and permutations.