Hosted by The Math Forum

Problem of the Week 1127

A Tale of Two Sons

_____________________________________________
MacPoW Home ||  Forum PoWs ||  Teachers' Place ||  Student Center ||  Search MacPoW
_____________________________________________

A woman has two children, not twins. One of them is a boy who was born on a Tuesday.

What is the probability that she has two boys?

Assume the basic boy-girl probability is 1/2. "One" means "at least one."

Source: Gary Foshee, seen on Ed Pegg's puzzle page, entry for Sept 7, 2009.

© Copyright 2009 Stan Wagon. Reproduced with permission.

[Privacy Policy] [Terms of Use]

_____________________________________
Home || The Math Library || Quick Reference || Search || Help 
_____________________________________

© 1994-2014 Drexel University. All rights reserved.
http://mathforum.org/
The Math Forum is a research and educational enterprise of the Drexel University School of Education.The Math Forum is a research and educational enterprise of the Drexel University School of Education.


17 November 2009