# 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. |

Same birthday probability (chart)

[1-9] /9 | Disp-Num |

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

[1] 2020/03/10 16:05 Male / 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

[2] 2017/05/08 15:05 Male / 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.

[3] 2015/06/24 21:44 Male / 60 years old level or over / An office worker / A public employee / Very /

- Purpose of use
- to play with the numbers.

[4] 2015/06/19 06:03 - / 50 years old level / A homemaker / Very /

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

[5] 2015/05/09 10:55 Male / 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.

[6] 2014/04/10 03:39 Female / 60 years old level or over / A teacher / A researcher / Very /

- Purpose of use
- business statistics class

[7] 2014/01/13 23:57 Female / 40 years old level / An office worker / A public employee / Very /

- Purpose of use
- Personal interest.

[8] 2013/09/16 12:19 Male / 30 years old level / An office worker / A public employee / Very /

- Purpose of use
- Calculate high precision operations that are unable to run on Casio Calculators.
- Comment/Request
- Very impressed. But there are sites where you could operate multiplications within five hundred thousand digits. Maybe Casio can do some more to improve.

[9] 2009/12/28 19:49 Male / Under 20 / A high school student / Very /

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