If you are in a room with 100 people what are the odds one of them will have the same birthday as you

Question

02-02-2018
Mathematics

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If you are in a room with 100 people what are the odds one of them will have the same birthday as you

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LittleNerdy LittleNerdy · Answer 1 · 2018-02-02T12:37:08+01:00

LittleNerdy LittleNerdy

02-02-2018

Um, this not might be correct cause I’m a much lower grader but,
How many odd numbers in 100:
I’m just guessing like it is like this...
Number of odd numbers in a 100 is 50.
So 50 people have the same birthday as you.

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arthurzhang2006 arthurzhang2006 · Answer 2 · 2018-02-02T12:38:31+01:00

arthurzhang2006 arthurzhang2006

02-02-2018

The answer should be 99.99997%.
This is the birthday paradox, where 23 people is 50%, 70 people is 99.9%, and 367 people is 100%(Feb 29 does count.)

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