翻訳と辞書 Words near each other ・ Rule of mutual exclusion ・ Rule of nines ・ Rule of product ・ Rule of reason ・ Rule of recognition ・ Rule of Ren and Xuan ・ Rule of replacement ・ Rule of Rescue ・ Rule of Rose ・ Rule of Saint Benedict ・ Rule of Sarrus ・ Rule of seven ・ Rule of six (viruses) ・ Rule of St. Augustine ・ Rule of succession ・ Rule of sum ・ Rule of the Bone ・ Rule of the Dukes ・ Rule of the Major-Generals ・ Rule of the Master ・ Rule of the octave ・ Rule of the road ・ Rule of the shorter term ・ Rule of the Theotokos ・ Rule of thirds ・ Rule of thirds (disambiguation) ・ Rule of thirds (diving) ・ Rule of thirds (military) ・ Rule of three ・ Rule of three (aeronautics) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rule of sum ： ウィキペディア英語版 Rule of sum In combinatorics, the rule of sum or addition principle is a basic counting principle. Stated simply, it is the idea that if we have ''a'' ways of doing something and ''b'' ways of doing another thing and we can not do both at the same time, then there are ''a'' + ''b'' ways to choose one of the actions. More formally, the rule of sum is a fact about set theory. It states that sum of the sizes of a finite collection of pairwise disjoint sets is the size of the union of these sets. That is, if $S\_,\; S\_,...,\; S\_$ are pairwise disjoint sets, then we have: :$|S\_|+|S\_|+\backslash cdots+|S\_|\; =\; |S\_\; \backslash cup\; S\_\; \backslash cup\; \backslash cdots\; \backslash cup\; S\_|$ == Simple example == A woman has decided to shop at one store today, either in the north part of town or the south part of town. If she visits the north part of town, she will either shop at a mall, a furniture store, or a jewelry store (3 ways). If she visits the south part of town then she will either shop at a clothing store or a shoe store (2 ways). Thus there are 3+2=5 possible shops the woman could end up shopping at today. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rule of sum」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.