<p>Questions that look for statistical insight related to working with odds, however simple they might seem, would likely be welcome here on CV if not already asked and answered.  This isn't one of them (but possibly it could be turned into one with some constructive and thoughtful editing).</p>
<p><strong>You misconstrue the reasons that were offered for closure.</strong> They have little to do with &quot;simplicity&quot; and everything to do with duplication and lack of topicality.</p>
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<li><p>Probabilities and odds are equivalent ways of expressing the same quantities.  You convert from probabilities to odds and back again as explained, <em>inter alia,</em> at <a href="https://stats.stackexchange.com/a/133633/919">https://stats.stackexchange.com/a/133633/919</a> (which also covers odds ratios), so that's been asked and answered.</p>
<p>A good analogy, IMHO, is between expressing temperatures in degrees Fahrenheit (F) and Celsius (C).  Would an explanation of global warming on a (hypothetical) climate site merit a repeat just to re-express all temperatures in F rather than C?  Perhaps if the purpose is to illustrate temperature conversions it would be appropriate on the Math site, but it wouldn't be suitable on a site for people interested in climate.</p>
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<li><p>You assert the Monty Hall problem has already appeared here on CV.  (See <a href="https://stats.stackexchange.com/questions/373.">https://stats.stackexchange.com/questions/373.</a>)  Why shouldn't that be sufficient reason to close a restatement of the question, especially one that asks nothing new?</p>
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<p>Thus, <strong>you haven't established any reason why any new version of the Monty Hall question should exist.</strong></p>
<p>In fact, wouldn't your argument, if it were accepted, imply anyone could <em>re-ask</em> all of the 100K+ questions related to probabilities that have already appeared here and request that they be re-explained with all probabilities expressed as odds?</p>
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<p>BTW, it bears repeating that two illegitimate reasons for not closing a question are (a) &quot;it was allowed before&quot; and (b) &quot;another site allows it.&quot;  Sometimes off-topic questions remain for historical purposes (the site's policies and norms have changed a little over the years) or because they were never detected by moderators in the first place.  And what other sites allow is their own business.  If you think Math would accept your question, by all means post it there.</p>
