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Groucho, Harpo, Chico, Zeppo, and Gummo have won 2 tickets to the opera. They will randomly choose which two of them have to attend. How many different 2-person groups are possible?
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Groucho, Harpo, Chico, Zeppo, and Gummo have won 2 tickets to the opera. They will randomly choose which two of them have to attend. How many different 2-person groups are possible?

User Myrs
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There are 10, 2 person groups that are possible.

User Deeshank
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