All Birthday Paradox

Electronic Fact Book

EN192. All Birthday Paradox
Select time period:
Class Size With Shared Birthdates Without Shared Birthdates
1 0% 100%
2 0% 100%
3 1% 99%
4 2% 98%
5 3% 97%
6 4% 96%
7 6% 94%
8 6% 94%
9 10% 90%
10 12% 88%
11 14% 86%
12 17% 83%
13 19% 81%
14 22% 78%
15 28% 72%
16 28% 72%
17 32% 68%
18 34% 66%
19 38% 62%
20 43% 57%
21 46% 54%
22 47% 53%
23 52% 48%
24 54% 46%
25 58% 42%
26 55% 45%
27 61% 39%
28 67% 33%
29 67% 33%
30 70% 30%
31 74% 26%
32 72% 28%
33 77% 23%
34 82% 18%
35 81% 19%
36 83% 17%
37 84% 16%
38 86% 14%
39 89% 11%
40 91% 9%
41 91% 9%
42 93% 7%
43 94% 6%
44 93% 7%
45 95% 5%
46 96% 4%
47 97% 3%
48 96% 4%
49 98% 2%
50+ 100% 0%