SOLUTION: A student needs 6 more classes to complete her degree. If they are all electives, how many ways can she take 3 classes next semester?

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Question 1134775: A student needs 6 more classes to complete her degree. If they are all electives, how many ways can she take 3 classes next semester?
Answer by ikleyn(52867) About Me  (Show Source):
You can put this solution on YOUR website!
.

There are  C%5B6%5D%5E3 = %286%2A5%2A4%29%2F%281%2A2%2A3%29 = 20 ways to do it.

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It is about Combinations. On combinations,  see the lessons
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - Math circle level problem 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.