http://www.mapleprimes.com/posts/143291-Probability-Girl en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Tue, 09 Jun 2026 15:08:26 GMT Tue, 09 Jun 2026 15:08:26 GMT The latest comments added to the Post, probability girl? http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/posts/143291-Probability-Girl http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment143295 <p>On the other hand, 'them' is indefinite, it could refer to Mr Brown, and his two children. &nbsp;Assuming that Mr Brown is male, we then know nothing about the sex of the children.</p> The latest comments added to the Post, probability girl? 143295 Sat, 09 Feb 2013 03:03:58 Z Joe Riel Joe Riel http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment147039 <p>I must say that I dont fully understand this problem:<br>Let say we switches to two stocks with + and - returns.<br><br>My portfolio contains 2 stocks. At least one of them has a negative return. <br>What is the probability that stock 2 has a positive return? <br><br>The probability should be 2/3 here as well but I dont understand how<br>to use that in an application...</p> The latest comments added to the Post, probability girl? 147039 Thu, 09 May 2013 21:21:25 Z marc005 marc005 http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment147044 <p><a href="http://www.mapleprimes.com/posts/143291-Probability-Girl#comment147039">@marc005</a>&nbsp;The probability of stock 2 being positive is 1/3.</p> The latest comments added to the Post, probability girl? 147044 Thu, 09 May 2013 22:37:47 Z Joe Riel Joe Riel http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment147054 <p>could you explain a little more please?! I am not sure I get this?<br>Is the stock example correct or is it wrong? If it is right it should be the same hummm (2/3)</p> The latest comments added to the Post, probability girl? 147054 Fri, 10 May 2013 00:42:42 Z marc005 marc005 http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment147055 <p><a href="http://www.mapleprimes.com/posts/143291-Probability-Girl#comment147054">@marc005</a>&nbsp;</p> <p>In your original: "<span>What is the probability&nbsp;</span><span>that the other is a girl?"</span></p> <p><span>In your stock example: "<span>What is the probability that stock 2 has a positive return?"</span></span></p> <p><span><span>In the original, it is not given which is the boy. So the identity of the "other" is not specified. In contrast, in the stock example you specifically ask about stock 2.</span></span></p> The latest comments added to the Post, probability girl? 147055 Fri, 10 May 2013 01:40:35 Z acer acer http://www.mapleprimes.com/posts/143291-Probability-Girl?ref=Feed:MaplePrimes:probability girl?:Comments#comment147057 <p>Regarding the girl probability, would it make a difference if the boy was older or younger than the sibling?&nbsp;</p> <p>Outside of the original question - an interesting thought - I would like to think there are most likely other factors at play, since it is the male who is the only one to contribute an X or a Y chromosome hence determine the sex of the child. &nbsp; Wouldn't his interactions with other people, that is if he hung around more females cause him to have a higher male Y chromosome probability and thus have a boy and similarily hanging around more guys cause him to have a higher X chromosome contribution hence a girl?&nbsp; That would make a ladies man more likely to have a boy as their first child.&nbsp;</p> The latest comments added to the Post, probability girl? 147057 Fri, 10 May 2013 02:27:00 Z Christopher2222 Christopher2222