# Same birthday probability (chart) Calculator

## Calculates a table of the probability that one or more pairs in a group have the same birthday and draws the chart. | ||

(1) the probability that all birthdays of n persons are different. (2) the probability that one or more pairs have the same birthday. This calculation ignores the existence of leap years. |

- Purpose of use
- find the right formula

[1] 2022/05/07 00:57 Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- study for discrete math

[2] 2022/05/06 04:46 30 years old level / High-school/ University/ Grad student / Useful /

- Purpose of use
- Idle conversation

[3] 2021/10/25 06:09 30 years old level / An office worker / A public employee / Very /

- Purpose of use
- hardworking/very useful

[4] 2021/06/24 10:13 20 years old level / High-school/ University/ Grad student / Useful /

- Purpose of use
- Helped me verify my calculations for a mathematical exploration on this topic,

[5] 2020/03/10 07:05 Under 20 years old / High-school/ University/ Grad student / Very /

- Purpose of use
- Study for Midterm in Discrete Math
- Comment/Request
- Thanks useful formula for many similar problems

[6] 2017/05/08 06:05 20 years old level / High-school/ University/ Grad student / Very /

- Purpose of use
- counter-intuitive? yes. explanation better? no, but it's a good explanation... i guess.

[7] 2015/06/24 12:44 60 years old level or over / An office worker / A public employee / Very /

- Purpose of use
- to play with the numbers.

[8] 2015/06/18 21:03 50 years old level / A homemaker / Very /

- Purpose of use
- Idle chat among men over coffee.

[9] 2015/05/09 01:55 60 years old level or over / A retired people / Very /

- Purpose of use
- doing a math workshop with an activity called "Do you have a birthday twin?". I wanted to give the teachers at the workshop some stats on this question.

[10] 2014/04/09 18:39 60 years old level or over / A teacher / A researcher / Very /

**To improve this 'Same birthday probability (chart) Calculator', please fill in questionnaire.**

**The hyperlink to [Same birthday probability (chart)]**