SOLUTION: At the library, Peter found 6 book of interest but he can only borrow 4 books. How many possible selections can he make?

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Question 1172207: At the library, Peter found 6 book of interest but he can only borrow 4 books. How many possible selections can he make?
Answer by ikleyn(52832) About Me  (Show Source):
You can put this solution on YOUR website!
.

    In  C%5B6%5D%5E4 = 6%21%2F%284%21%2A2%21%29 = %286%2A5%29%2F2 = 3*5 = 15  ways.    ANSWER

Solved.

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This problem is on COMBINATIONS.


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.