Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » discretemath

Topic: a gift exchange
Replies: 6   Last Post: Aug 10, 2013 11:20 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
John

Posts: 54
Registered: 12/6/04
a gift exchange
Posted: Nov 23, 2004 8:51 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Ten friends organize a gift exchange. The ten names are put in a hat,
and the first person draws one. If they pick their own name, they
return it to the bag and draw again, until they have a name that is
not their own. Then the second person draws, again returning their
own name if they draw it. This continues down the line. What is the
probability that when the 10th person draws, only their own name will
be left in the bag?

Any help!!!




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.