Question 342300
This would be the combination formula of n! / (x! * (n-x)!) where:


n = total number of people (6 in your case).


x = number of people to be selected at one time (2 in your case).


The formula for you becomes 6! / (2! * 4!) which becomes 6*5/2 which becomes 15.


If we assume the people are abcdef, then the possible ocmbinations are:


ab
ac
ad
ae
af
bc
bd
be
bf
cd
ce
cf
de
df
ef


This assumes the order in which they are selected is not important.


None of the sets has the same 2 people in them, regardless of order.