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Actually, if everyone has babies of sex A until you have a baby of sex B, you get a 50/50 mix. - Half the parents will have an only child of sex B. - One q
by squidfood 10y ago
Actually, if everyone has babies of sex A until you have a baby of sex B, you get a 50/50 mix.
- Half the parents will have an only child of sex B.
- One quarter will have one A, one B.
- One eighth will have A, A, B.
- One sixteenth A,A,A,B.
This converges on 50/50!
- xadhominemx 10y agoWell if you assume some sort of practical limit to the number of children a couple can have, then you end up with more B.
- squidfood 10y agoActually, no. If you have a hard limit, then some people will end up A,A, ... A with no B. That evens it up again.
- xadhominemx 10y agoTrue
- gweinberg 10y agoThat's true, but it doesn't imply boys and girls have the same number of brothers. As a commenter in the op pointed out, if families keep having children until they have a son, no boys have any brothers and all girls have exactly one brother. I think if they keep having kids until they have a girl, though, for gors and boys you have a .5 chance no brother, .25 1 brother, and so on.