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My vault dwellers haven't been able to give birth to any male babies. I've had about 10 pregnancies but they all were girls.

I'm wondering if this caused by a bug in the game or is it just based on luck?

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I guess this is just a matter of probability. The probability to get children of only one gender is (1/2)10 which is 1/210 which is 1 in 1024, which is about 1 tenth of a percent (~ 0.1%). Not really impossible, only unlikely.

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  • That seems incredibly high. do you have a source?
    – Ben
    Aug 1, 2016 at 7:02
  • @Ben A source for what? The probability of a set of independent events being the individual probabilities multiplied together? Aug 1, 2016 at 7:18
  • @Ben. Are you asking for a source that babies have a 1/2 chance of being male, or are you asking for a source that getting 10 female babies in a row has a chance of 1/1024?
    – Nolonar
    Aug 1, 2016 at 7:19
  • Ok, I misread that. The answer is a little unclear in it's subject matter (out of context), so I made the assumption it was the chance of getting a baby boy.
    – Ben
    Aug 1, 2016 at 7:22

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