What is the probability of fatherhood in this scenario?

Say 3 equally fertile men have sex with 1 woman all at once. She becomes pregnant from this specific incident.

Is each man's probability of being the dad 1:2 or is it 1:3? Or another figure entirely?

Please explain.

1:2 0
1:3 7
Other answer (comment) 1
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Comments ( 9 )
  • dappled? Paging Dr dappled! Your assistance is needed.

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    • dappled

      Heh! Hello! I was going to respond to this anyway. :P

      There isn't a set chance because women can influence which man they are going to get pregnant by (without knowing they are doing it).

      If it's artificial insemination and all three men's sperm are mixed up in a single insemination then the deciding factor won't involve the woman but instead be about the quality and motility of the individual men's sperm.

      All things being equal, it would technically be 1:3 but you have to factor in odd events like the possibility that she could conceive of twins who have different fathers (odd scenario but, in very rare circumstances, it can happen).

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  • dirtybirdy

    1:3 of course...right?? But let me get this straight. Are you saying that she has three penises simultaneously in her fat cow vagina, and that each man spunks at the same time?

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    • I guess we could simplify it to have her artificially inseminated by 3 guys at ones to make it absolutely fair.

      It's confusing for me because each man has a 50/50 chance individually (like a coin toss, right? He either is or isn't) but as a group it's 1:3 chance. Does this make sense? I don't know if this skews the odds. I'm so confused. Is this even calculable? It probably makes no sense at all and I'm just an idiot.

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      • Couman

        No, that's not a 50/50 chance at all. Do I have a 50% chance of being struck be lightning "because either I will or I won't"?

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        • You're confused.

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          • Couman

            Let me elaborate:

            Say 1,000,000 equally conductive men go out in 1 thunderstorm all at once. Lightning kills someone from this specific incident.

            Is each man's probability of being the dead 1:2 or is it 1:1,000,000? Or another figure entirely?

            It's confusing for me because each man has a 50/50 chance individually (like a coin toss, right? He either is or isn't)

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      • dirtybirdy

        Ohh I see what you're saying about 50/50 individually and 1:3 from the group. Well, each individuals 50/50 makes up one whole, him, so I still think it would be 1:3.

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  • anti-hero

    The father would be Han Solo. We all know Han shot first.

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