SOLUTION: A high school graduating class has 400 members. The principal must select 3 of these students to attend the annual state student conference. How many ways can this be done?

Question 1169741: A high school graduating class has 400 members. The principal must select 3
of these students to attend the annual state student conference. How many ways
can this be done?
Answer by ikleyn(52778) (Show Source): You can put this solution on YOUR website!
.


      = .


The number of combinations of 400 members taken 3 at a time.

MEMORIZE the formula and the MANTRA (!)

-------------

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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