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#REDIRECT [[Birthday problem]] |
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A '''Birthday paradox''' arises from either of the following cases that give unexpected, counter-intuitive outcomes. |
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*In even a small group of people there are often two or more that have the same [[birthday]]. Calculation of the probability of this occuring is called the [[Birthday problem]]. |
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*A person born on February 29th will have fewer birthdays than their age in years. This seeming [[paradox]] is presented in the operetta [[The Pirates of Penzance]] where the birthday of Frederic the pirate apprentice leads to this exchange: |
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:FRED. How quaint the ways of Paradox! |
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:At common sense she gaily mocks! |
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:Though counting in the usual way, |
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:Years twenty-one I've been alive, |
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:Yet, reckoning by my natal day, |
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:I am a little boy of five! |
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:RUTH and KING. He is a little boy of five! Ha! ha! ha! |
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:ALL. A paradox, a paradox, |
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:A most ingenious paradox! |
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Revision as of 01:49, 7 October 2008
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