document.write( "Question 619271: how do you get better in knowing if the problem is permutation and combination and how do you know what numbers to use for each \n" ); document.write( "

Algebra.Com's Answer #389522 by Theo(13342) $\"\"$ $\"About$

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practice.
\n" ); document.write( "do problems involving them and you'll eventually see the relationships.
\n" ); document.write( "here's some links that can help you determine.
\n" ); document.write( "http://www.mathsisfun.com/combinatorics/combinations-permutations.html
\n" ); document.write( "http://www.omegamath.com/Data/d2.2.html
\n" ); document.write( "http://www.algebra.com/algebra/homework/Permutations/change-this-name6021.lesson
\n" ); document.write( "http://www.regentsprep.org/Regents/math/algtrig/ATS5/PCPrac.htm
\n" ); document.write( "http://www.scribd.com/doc/7240679/Permutation-and-Combinations-Test-15-Problems-and-Answers
\n" ); document.write( "the lessons will tell you that permutations are used when order is important and combinations are used when order is not important.
\n" ); document.write( "that's basically it, but only practice helps you to recognize the situations when combinations are asked for or where permutations are asked for.
\n" ); document.write( "some basics.
\n" ); document.write( "you select a team that includes members but roles within the team are not assigned - use combinations.
\n" ); document.write( "you select a team that includes members with each member assigned a specific role on that team - use permutations.
\n" ); document.write( "you want to get the first 3 winners of a race but order of each winner is not important - use combinations.
\n" ); document.write( "you want to get the first 3 winners of a race but order of each winner is important - use permutations.
\n" ); document.write( "permutations will give you more possible sets than combinations.
\n" ); document.write( "a set containing a,b,c is one set.
\n" ); document.write( "if order is not important, than all the set has to do is contain the members a,b,c in any order.
\n" ); document.write( "a,b,c or a,c,b or b,a,c or b,c,a or c,a,b or c,b,a doesn't matter - they're all considered part of the same set.
\n" ); document.write( "on the other hand, if order matters, then:
\n" ); document.write( "a,b,c or a,c,b or b,a,c or b,c,a or c,a,b or c,b,a does matter - each one of them is considered a separate set even if all of them contain the same members each.
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