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- Newsgroups: rec.puzzles
- Path: sparky!uunet!gatech!udel!rochester!cornell!karr
- From: karr@cs.cornell.edu (David Karr)
- Subject: Re: Are you sure?
- Message-ID: <1993Jan25.145759.2592@cs.cornell.edu>
- Organization: Cornell Univ. CS Dept, Ithaca NY 14853
- References: <1993Jan22.131719.36@janus.arc.ab.ca>
- Date: Mon, 25 Jan 1993 14:57:59 GMT
- Lines: 14
-
- In article <1993Jan22.131719.36@janus.arc.ab.ca> morgan@arc.ab.ca (Sean Morgan) writes:
- >You meet the daughter of a friend of yours on the street. You know
- >that your friend has two children. You think to yourself, "Ignoring
- >the occurrence of twins, and sex-linked differences in birth rates
- >and infant mortality, what are the odds of this girl's sibling also
- >being a girl?"
-
- Which of my friends did you have in mind? Then I can tell you whether
- the odds are 0% or 100%.
-
- -- David Karr (karr@cs.cornell.edu)
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