SOLUTION: If a class has 28 students, how many different arrangements can 5 students give a presentation to the class?

Question 1105901: If a class has 28 students, how many different arrangements can 5 students give a presentation to the class?
Answer by ikleyn(52777) (Show Source): You can put this solution on YOUR website!
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If the order of the presentations in each set of 5 presentations does matter, then the answer is 28*27*26*25*24.   (Permutations)


If the order of the presentations in each set of 5 presentations does not matter, then the answer is   = .    (Combinations)

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On Combinations and Permutations see the lessons
    - Introduction to Permutations
    - PROOF of the formula on the number of Permutations
    - Problems on Permutations
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - Arranging elements of sets containing indistinguishable elements
    - Persons sitting around a cicular table
    - Combinatoric problems for entities other than permutations and 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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