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Secret Santas I

Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.

 

Puzzle ID:#43847
Fun:*** (2.23)
Difficulty:*** (2.96)
Category:Probability
Submitted By:javaguru*us**

 

 

 



A group of about twenty friends decide to exchange gifts as secret Santas. Each person writes their name on a piece of paper and puts it in a hat and then each person randomly draws a name from the hat to determine who has them as their secret Santa.

What is the probability that at least one person draws their own name?





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