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Sarah has 6 friends who are available to go with her to the movies, but she only has 2 extra tickets. How many different choices does Sarah have for which 2 friends to invite.
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Sarah has 6 friends who are available to go with her to the movies, but she only has 2 extra tickets. How many different choices does Sarah have for which 2 friends to invite.

User Error Hunter
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Person 1: 5 choices to pair with
Person 2: 4 choices
Person 3: 3 choices
Person 4: 2 choices
Person 5: 1 choice

Therefore, she has 15 choices for which 2 friends to invite
User Jperelli
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