2009-03-12, 07:48 PM
Devil's Sunrise Wrote:The thing is, it still is random~ We don't know whether the first or the second child is the boy.
"A woman has two kids. One is a boy. What are the odds the other is a boy?"
Let's rephrase the question into this:
"A woman has two kids. It is not the case that they are both girls. What are the odds both kids are boys?"
Will your answer be different then?
AH! Then it is indeed 1/3. But only because in the answer, one is now dependant to the other. Before, it was only the sex of the other boy, regardless of his brother's sex.