Question 1161255
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If the probability is 40% that it will rain, then there are 40 similar circumstances in which it will rain and 100 total similar circumstances, or 2 successes divided by 5 possibilities.  If there are 5 possibilities and 2 of them are successes, then three must be failures.  The odds of anything are the number of successes : the number of failures.  2:3
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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