If he used the numeric approximation formula from the bithday page for the calculation maybe there is some error in 30K
![{\displaystyle {\begin{aligned}p(n,d)&\approx 1-e^{-{\frac {n(n-1)}{2d}}}\\[6pt]&\approx 1-e^{-{\frac {n^{2}}{2d}}}.\end{aligned}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3ff46256637894d0250baba3169b2dffd07abf2b "{\displaystyle {\begin{aligned}p(n,d)&\approx 1-e^{-{\frac {n(n-1)}{2d}}}\\[6pt]&\approx 1-e^{-{\frac {n^{2}}{2d}}}.\end{aligned}}}")
even on that link it says
would you bet the house on 366 people in a room having no shared birthday. ?
eg. being born later in the year and being older in school year is meant to be advantageous for qualifications , so a room full of 366 graduates might, for example, be biassed
even on that link it says
[td]
[/td]eg. being born later in the year and being older in school year is meant to be advantageous for qualifications , so a room full of 366 graduates might, for example, be biassed
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