From 79e97884fde008dc9c2543489b3b55ed88bdeb38 Mon Sep 17 00:00:00 2001
From: LailaTheElf <mail@lailatheelf.nl>
Date: Fri, 22 Aug 2025 16:39:38 +0200
Subject: [PATCH] add readme

---
 readme.md | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 readme.md

diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..574a6d3
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,75 @@
+Calculate the change that there are peopele with the same birthday.
+
+![plot](./plot.svg)
+
+| group size | chance in fraction |
+|----|-----------------------|
+| 2  | 0.0027397260273972603 |
+| 3  | 0.008204165884781385  |
+| 4  | 0.016355912466550306  |
+| 5  | 0.027135573699793587  |
+| 6  | 0.04046248364911148   |
+| 7  | 0.0562357030959754    |
+| 8  | 0.07433529235166902   |
+| 9  | 0.09462383388916669   |
+| 10 | 0.11694817771107764   |
+| 11 | 0.14114137832173304   |
+| 12 | 0.16702478883806438   |
+| 13 | 0.19441027523242937   |
+| 14 | 0.223102512004973     |
+| 15 | 0.25290131976368635   |
+| 16 | 0.2836040052528499    |
+| 17 | 0.3150076652965606    |
+| 18 | 0.3469114178717893    |
+| 19 | 0.3791185260315367    |
+| 20 | 0.41143838358058      |
+| 21 | 0.4436883351652057    |
+| 22 | 0.4756953076625501    |
+| 23 | 0.5072972343239854    |
+| 24 | 0.5383442579145288    |
+| 25 | 0.5686997039694639    |
+| 26 | 0.5982408201359389    |
+| 27 | 0.626859282263242     |
+| 28 | 0.6544614723423994    |
+| 29 | 0.680968537477777     |
+| 30 | 0.7063162427192686    |
+| 31 | 0.7304546337286438    |
+| 32 | 0.7533475278503207    |
+| 33 | 0.774971854175772     |
+| 34 | 0.7953168646201543    |
+| 35 | 0.8143832388747152    |
+| 36 | 0.8321821063798795    |
+| 37 | 0.8487340082163846    |
+| 38 | 0.8640678210821209    |
+| 39 | 0.8782196643667219    |
+| 40 | 0.8912318098179489    |
+| 41 | 0.9031516114817353    |
+| 42 | 0.9140304715618691    |
+| 43 | 0.9239228556561198    |
+| 44 | 0.9328853685514262    |
+| 45 | 0.9409758994657749    |
+| 46 | 0.9482528433672547    |
+| 47 | 0.9547744028332993    |
+| 48 | 0.9605979728794224    |
+| 49 | 0.9657796093226765    |
+| 50 | 0.9703735795779884    |
+| 51 | 0.9744319933344283    |
+| 52 | 0.9780045093342753    |
+| 53 | 0.9811381134839128    |
+| 54 | 0.9838769627588515    |
+| 55 | 0.9862622888164461    |
+| 56 | 0.9883323548852008    |
+| 57 | 0.9901224593411699    |
+| 58 | 0.9916649793892612    |
+| 59 | 0.992989448417817     |
+| 60 | 0.994122660865348     |
+| 61 | 0.9950887988052908    |
+| 62 | 0.9959095748953655    |
+| 63 | 0.9966043868309472    |
+| 64 | 0.9971904789669755    |
+| 65 | 0.9976831073124922    |
+| 66 | 0.9980957046404045    |
+| 67 | 0.9984400429793999    |
+| 68 | 0.9987263912544142    |
+| 69 | 0.9989636663083864    |
+| 70 | 0.9991595759651571    |