tag:blogger.com,1999:blog-3802979373213475425.post6232061702870762158..comments2019-04-20T15:33:02.879+05:30Comments on Critical Thinking Puzzles: Birth Probability PuzzleUnknownnoreply@blogger.comBlogger6125tag:blogger.com,1999:blog-3802979373213475425.post-81043760231180825062016-06-24T02:58:45.748+05:302016-06-24T02:58:45.748+05:301/31/3Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-58552292485046313102016-04-15T16:17:06.242+05:302016-04-15T16:17:06.242+05:30Josh, you answered the question "What is the ...Josh, you answered the question "What is the probability that both children are boys?"<br />This riddle is:<br />"What is the probability that the other child is also a boy?"João Marqueshttps://www.blogger.com/profile/17279183652589270695noreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-59649971463284411472016-02-24T00:16:58.320+05:302016-02-24T00:16:58.320+05:30A thorough description is here:
https://en.wikiped...A thorough description is here:<br />https://en.wikipedia.org/wiki/Boy_or_Girl_paradoxJosh D.https://www.blogger.com/profile/13718628093230589490noreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-73896104751730900642016-02-22T19:06:35.578+05:302016-02-22T19:06:35.578+05:301/2. Mutually exclusive events.1/2. Mutually exclusive events.larry atkinsonhttps://www.blogger.com/profile/07553905750981286196noreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-34506998652551863202016-02-22T10:20:07.025+05:302016-02-22T10:20:07.025+05:30They have two children. The probabilities are:
P(...They have two children. The probabilities are:<br />P(BB) = 1/4<br />P(BG) = 1/4<br />P(GB) = 1/4<br />P(GG) = 1/4<br /><br />One of the children is a boy, so we can eliminate the GG option. This leaves us with the first three scenarios still as viable options. Of the three options remaining, only 1 of the 3 options is BB. Thus, the probability is 1/3.<br /><br />Saying "one of the children is a boy" is different than the case where they said something like "The older child is a boy." In that case it would be 1/2, not 1/3.Josh D.https://www.blogger.com/profile/13718628093230589490noreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-57342244537060425712016-02-21T22:58:31.772+05:302016-02-21T22:58:31.772+05:30The probability is the same as the first time. It...The probability is the same as the first time. It is like a coin toss. History plays no role. The probability is 1/2. If we did not know that the first child is a boy, the probability of having two boys would be 1/4. Jerry Critterhttps://www.blogger.com/profile/01870618647449723147noreply@blogger.com