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Find out how many different ways you can choose items.; For an in-depth explanation of the formulas please visit Combinations and Permutations.
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www.mathsisfun.com/combinatorics/combinations-permutati...
www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html
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Permutations and Combinations: Deriving Formulae [06/18/1998] I have been trying to figure out how to arrive at the formula for calculating combinations.
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mathforum.org/dr.math/tocs/permutations.high.html
mathforum.org/dr.math/tocs/permutations.high.html
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Date: 06/19/98 at 07:52:58 From: Doctor Anthony Subject: Re: Combinations The mathematics we use in calculating the number of combinations of, say, 6 things from 49 comes under the general heading of Permutations and Combinations.
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mathforum.org/library/drmath/view/56120.html
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Calculating permutations is the easiest. If we are to pick k numbers from a pool of n, we have n choices for the first one. ... Summary: Discusses the basics of combinations and permutations, and how to calculate the probability of certain events, such as n-bit errors in a codeword.
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cnx.org/content/m10262/latest/
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･ 1 Define a combinationA combination is the number of ways that that objects can be arranged, in which... ･ 2 Calculate a combination, with repetition, by handThe variables in the following formula are:n: total... ･ 3 Calculate a combina...
http://www.ehow.com/how_4466533_calculate-combinations-...
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Permutation - Wikipedia, the free encyclopedia
In several fields of mathematics the term permutation is used with different but closely related meanings. They all relate to the notion of mapping the elements of a set to other elements of the sam...
en.wikipedia.org/wiki/Permutation
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Oct 25, 2000 ... Combinations: Combinations are like permutations except that they are ... You'll then see exactly why the rule for calculating entries in ...
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www.geometer.org/mathcircles/comb.pdf
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Thoughts on Teaching Permutations, Combinations and the Binomial Theorem ... (The notations for permutations and combinations vary quite a bit, for example with combinations we often see both and ;
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mathcentral.uregina.ca/RR/database/RR.09.95/nom1.html
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Choose one: Combinations or Permutations or Repeatable ; ... Combinations: If one has 5 different objects (e.g. A, B, C, D, and E), how many ways can they be grouped as 3 objects when position does not matter (e.g. ABC, ABD, ABE, ACD, ACE, ADE are correct but CBA is not ok as is equal to ABC) - answer is 10 ways.
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www.chemical-ecology.net/java/comb.htm
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