Hosted by The Math Forum## Problem of the Week 1127## A Tale of Two Sons
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. |

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17 November 2009