The binomial coefficient is the number of ways of picking unordered outcomes from possibilities, also known as a combination or combinatorial number. The symbols and are used to denote a binomial coefficient, and are sometimes read as " choose ." therefore gives the number of k-subsets possible out of a set of distinct items. For example, The 2-subsets of are the six pairs , , , , , and , so .
For further explation see this web site: mathworld.wolfram.com/BinomialCoefficient.html
2006-12-21 08:03:31
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answer #2
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answered by sgt_cook 7
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