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.

Same birthday probability (chart)
n
    1. ~
    2. persons
    3. in a group

(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)
    [1-10] /15Disp-Num
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    [1]  2022/12/29 03:04   60 years old level or over / An office worker / A public employee / Very /
    Purpose of use
    Conversation on the probability that three people in an office of 9 would have the same birthday; 3 generations (+70, +50, <20)
    [2]  2022/10/11 06:24   Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    school statistics homework
    [3]  2022/05/07 00:57   Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    find the right formula
    [4]  2022/05/06 04:46   30 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    study for discrete math
    [5]  2021/10/25 06:09   30 years old level / An office worker / A public employee / Very /
    Purpose of use
    Idle conversation
    [6]  2021/06/24 10:13   20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    hardworking/very useful
    [7]  2020/03/10 07:05   Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    Helped me verify my calculations for a mathematical exploration on this topic,
    [8]  2017/05/08 06:05   20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    Study for Midterm in Discrete Math
    Comment/Request
    Thanks useful formula for many similar problems
    [9]  2015/06/24 12:44   60 years old level or over / An office worker / A public employee / Very /
    Purpose of use
    counter-intuitive? yes. explanation better? no, but it's a good explanation... i guess.
    [10]  2015/06/18 21:03   50 years old level / A homemaker / Very /
    Purpose of use
    to play with the numbers.

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