Question

Solution conflict: Expected number of distinct birthdays for $100$ people

score 7.1k · Answer 1 · 2026-04-09 07:25:37

7.1k

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Solution conflict: Expected number of distinct birthdays for $100$ people

Published on 09 Apr 2026 - 7:25

score 80 · Answer 2 · 2026-04-09 18:19:24

80

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Inspired by the Birthday Problem

Published on 09 Apr 2026 - 18:19

score 64 · Answer 3 · 2026-04-10 09:52:00

64

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Collisions in a Sample

Published on 10 Apr 2026 - 9:52

score 93 · Answer 4 · 2023-02-14 22:01:20

93

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How to work out the probability of two random sequences sharing a certain number of matches?

Published on 14 Feb 2023 - 22:01

score 44 · Answer 5 · 2026-04-07 21:04:47

44

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Help with deriving solution for multiple birthday problem

Published on 07 Apr 2026 - 21:04

score 72 · Answer 6 · 2023-02-23 14:20:43

72

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Birthday-esque problem, but for 2 pairs, or a triple

Published on 23 Feb 2023 - 14:20

score 50 · Answer 7 · 2026-04-11 03:25:13

50

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Classmate birthday Probability

Published on 11 Apr 2026 - 3:25

score 101 · Answer 8 · 2023-05-14 15:56:41

101

Views

Miscalculating Probability of At Least $2$ People Having The Same Birthday

Published on 14 May 2023 - 15:56

score 59 · Answer 9 · 2026-04-03 22:42:04

How can I prove that the probability that exactly 2 people share the same birthday is more likely than everyone has a different day out of 20 people?

score 44 · Answer 10 · 2023-05-27 12:01:53

44

Views

Number of date collisions in birthday problem

Published on 27 May 2023 - 12:01

score 72 · Answer 11 · 2026-04-08 20:41:46

72

Views

Birthday Problem Confusion Using the Counting Rule

Published on 08 Apr 2026 - 20:41

score 47 · Answer 12 · 2026-04-11 02:06:53

47

Views

The Birthday paradox with variable-likelihood birthdays.

Published on 11 Apr 2026 - 2:06

score 73 · Answer 13 · 2026-04-05 20:43:05

73

Views

How many people must be in a room until it is at least a $50\%$ chance that two will have the same amount of change?

Published on 05 Apr 2026 - 20:43

score 139 · Answer 14 · 2026-04-09 16:34:38

139

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Birthday Problem: Confusion between PMF and CDF -

Published on 09 Apr 2026 - 16:34

score 348 · Answer 15 · 2026-03-28 15:21:12

Family Members Birthday Dates all different, but our birthdays will fall on same day, even Leap Years. There is a total of 9 in this Birthday Club. .

List Question

Solution conflict: Expected number of distinct birthdays for $100$ people

Inspired by the Birthday Problem

Collisions in a Sample

How to work out the probability of two random sequences sharing a certain number of matches?

Help with deriving solution for multiple birthday problem

Birthday-esque problem, but for 2 pairs, or a triple

Classmate birthday Probability

Miscalculating Probability of At Least $2$ People Having The Same Birthday

How can I prove that the probability that exactly 2 people share the same birthday is more likely than everyone has a different day out of 20 people?

Number of date collisions in birthday problem

Birthday Problem Confusion Using the Counting Rule

The Birthday paradox with variable-likelihood birthdays.

How many people must be in a room until it is at least a $50\%$ chance that two will have the same amount of change?

Birthday Problem: Confusion between PMF and CDF -

Family Members Birthday Dates all different, but our birthdays will fall on same day, even Leap Years. There is a total of 9 in this Birthday Club. .

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