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What's the probability that three generation of first born

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What's the probability that three generation of first born [#permalink] New post 22 Dec 2003, 13:14
What's the probability that three generation of first born have the same date of birth? (discard the fact that there are any leap years)
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Re: Interesting Probability [#permalink] New post 22 Dec 2003, 15:32
wonder_gmat wrote:
What's the probability that three generation of first born have the same date of birth? (discard the fact that there are any leap years)


The first can be born on any day out of 365 days.
The second has 1/365 chance that he'll be born on the same day
Again, the third has 1/365 chance that he'll born on the same day.


1*1/365 * 1/365
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 [#permalink] New post 22 Dec 2003, 18:09
Very good approach Praeth, you seem to nail every single question. When are you taking the exam by the way?
  [#permalink] 22 Dec 2003, 18:09
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