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Recent Activity

Activity stream for all registered members at LostCousins Genealogy Forums.

  1. TerryM replied to the thread Twins puzzle.

    I will acknowledge that I was in error with the door puzzle, after viewing that explanation link I have realised my error. When the host...

    Jun 13, 2021 at 3:23 AM

  2. peter replied to the thread 1911 census entry - loss of parents ?.

    There's also the possibility that they were suffragists, many of whom refused to be listed on the census.

    Jun 12, 2021 at 5:05 PM

  3. peter rated Bryman's post Agree in the thread 1911 census entry - loss of parents ?.

    Might the parents have been out of the country at the time of the census? Many of my ancestors are missing from various census returns due...

    Jun 12, 2021 at 5:04 PM

  4. peter replied to the thread Twins puzzle.

    Imagine you're tossing a coin which comes up heads or tails with equal frequency (a 'fair coin'). Tossing the coin twice in succession is...

    Jun 12, 2021 at 5:02 PM

  5. peter replied to the thread Twins puzzle.

    At the beginning there are 4 equally likely possibilities, thus the chance that the twins are the same gender is 1/2. The implication of...

    Jun 12, 2021 at 4:52 PM

  6. webwiz replied to the thread Twins puzzle.

    You have to somehow identify the two foetuses. It can be arbitrary or the heaviest or the first conceived or any way you want. Do you agree...

    Jun 12, 2021 at 2:23 PM

  7. Bryman replied to the thread 1911 census entry - loss of parents ?.

    Might the parents have been out of the country at the time of the census? Many of my ancestors are missing from various census returns due...

    Jun 12, 2021 at 1:06 PM

  8. Bryman replied to the thread Twins puzzle.

    The four possible outcomes are MM and MF from consideration of the first lamb being male, together with MM and FM from consideration of the...

    Jun 12, 2021 at 12:53 PM

  9. webwiz replied to the thread Twins puzzle.

    Yes that's one way of putting it, but I prefer to calculate the chance of both being male, which is clearly 25% of the original 1000 or one...

    Jun 12, 2021 at 12:44 PM

  10. Helen7 replied to the thread 1911 census entry - loss of parents ?.

    I see the form was completed by Caroline, and as the siblings are all adults, maybe they didn't regard any of them as being 'Head of the...

    Jun 12, 2021 at 12:12 PM

  11. Helen7 replied to the thread Twins puzzle.

    But of those 1500 foetuses in the other groups, 750 have been shown to be male by the genetic test, so that leaves only 750 of unknown sex,...

    Jun 12, 2021 at 10:26 AM

  12. webwiz replied to the thread Twins puzzle.

    What's wrong with this analysis? Imagine 1000 sheep all carrying twins with equal chance of gender throughout so there are 1000 male and...

    Jun 12, 2021 at 9:57 AM

  13. Helen7 replied to the thread Twins puzzle.

    I've just put this puzzle to my son, who is a mathematician, and his first response was "it depends on the relative likelihood of fraternal...

    Jun 12, 2021 at 8:15 AM
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