A woman has two kids, one of them is a girl

Paedantic Basterd · 03-04-2013, 10:08 PM

Quote:

Originally Posted by Burning Down

That wouldn't determine the ratio of women to men though, since women are supposed to have two X chromosomes and men determine the gender of their children, so then there are only as many X sperm around as there are men in the world.

Right, I didn't think that through.

Paedantic Basterd · 03-04-2013, 10:06 PM

Do those recorded births only take into account infants after a certain age, or is it possible that infantcide could make up the 14+ point difference?

This topic is piquing three of my academic interests at once.

**Janszoon** · 03-04-2013, 10:09 PM

Quote:

Originally Posted by Pedestrian

Do those recorded births only take into account infants after a certain age, or is it possible that infantcide could make up the 14+ point difference?

This topic is piquing three of my academic interests at once.

I think it's based on the gender at birth, but I don't really know. This seems to indicate that it's a naturally occurring phenomenon.

Cinnamonics · 03-05-2013, 10:11 AM

Well, normally I would say 50%, disregarding biological factors, but you used the word "also", which makes me say 25%. From what I remember of probability math, it should be 0.5 x 0.5.

View Poll Results: What are the chances the other is also a girl?
0%	1	9.09%
25%	0	0%
33%	4	36.36%
50%	5	45.45%
100%	1	9.09%
Voters: 11. You may not vote on this poll

03-04-2013, 10:06 PM	#2 (permalink)
Paedantic Basterd Music Addict Join Date: Sep 2010 Posts: 5,184	Do those recorded births only take into account infants after a certain age, or is it possible that infantcide could make up the 14+ point difference? This topic is piquing three of my academic interests at once.

03-05-2013, 10:11 AM	#4 (permalink)
Cinnamonics Music Addict Join Date: Dec 2012 Posts: 117	Well, normally I would say 50%, disregarding biological factors, but you used the word "also", which makes me say 25%. From what I remember of probability math, it should be 0.5 x 0.5.