Answered: You'd like to study social networks.…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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What kind of problem as this and what steps do I take to solve it?

You'd like to study social networks. Consider the following 7 people {A,B,C,D,E,F,G} in a social network graph. Here, we'd like to model "followers." How many different ways can we draw arrows between two people from these 7? Here, "A-->B" (A is a follower of B) is not the same as "B-->A" (B is a follower of A). Order matters here.

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Step 1

It is a problem of permutation and combination because 2 persons among 7 are needed to be select and then arrange those 2 person because the direction of arrow matters. It can also be solved directly by permutation because selection of 2 objects and then arrange them is a permutation problem.

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