(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

There're 8 people in the room and each person shakes hand with the other .

2. Relevant equations

How many hand shakes are there ?

3. The attempt at a solution

One person will shake hand with 7 other people and so on . As a result there should be 8 power of 7 but the result is different ?

P/S : Can you explain what's the difference between combination and permutation ?

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# Homework Help: Combination question

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