A research study needs to select two people to participate from a group of thirteen. Calculate...
A research study needs to select two people to participate from a group of thirteen. Calculate the total number of unique groups that can be formed. There are nothing unique groups that can be formed.
Homework Answers
Number of unique groups that can be formed
= Number of ways of selecting 2 people out of 13
= 13C2
= 13! / (2!*11!)
= (13*12) / 2
= 13*6
= 78
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