Boy or Girl paradox ^{en}
The Boy or Girl paradox surrounds a wellknown set of questions in probability theory which are also known as The Two Child Problem, Mr. Smith's Children and the Mrs. Smith Problem. The initial formulation of the question dates back to at least 1959, when Martin Gardner published one of the earliest variants of the paradox in Scientific American. Titled The Two Children Problem, he phrased the paradox as follows: Mr. Jones has two children. The older child is a girl. What is the probability that both children are girls? Mr. Smith has two children. At least one of them is a boy. What is the probability that both children are boys? Gardner initially gave the answers 1/2 and 1/3, respectively; but later acknowledged that the second question was ambiguous. Its answer could be 1/2, depending on how you found out that one child was a boy. The ambiguity, depending on the exact wording and possible assumptions, was confirmed by BarHillel and Falk, and Nickerson. Other variants of this question, with varying degrees of ambiguity, have been recently popularized by Ask Marilyn in Parade Magazine, John Tierney of The New York Times, and Leonard Mlodinow in Drunkard's Walk. [  ]
Freebase Commons Metaweb System Types /type
 
 Boy or Girl paradox
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 Boy or Girl
 
 
 http://en.wikipedia.org/wiki/index.html?curid=2686017
 http://it.wikipedia.org/wiki/index.html?curid=1153002
 http://fr.wikipedia.org/wiki/index.html?curid=723175
 http://fr.wikipedia.org/wiki/Paradoxe_des_deux_enfants
 http://fa.wikipedia.org/wiki/index.html?curid=212699
 http://ru.wikipedia.org/wiki/index.html?curid=3584904
 http://fa.wikipedia.org/wiki/پارادوکس_جنسیت
 http://ru.wikipedia.org/wiki/Парадокс_мальчика_и_девочки
 http://de.wikipedia.org/wiki/JungeoderMädchenProblem
 http://de.wikipedia.org/wiki/index.html?curid=7555604
 
 
 
 
 
 

 
 