Posted by **sam** on Saturday, August 22, 2009 at 11:10pm.

If the odds in favor of an event A are 3 to 1, what is the probability associated with event A occurring? I am so confused with this question could you show me how I could solve it?

- Math -
**DrBob222**, Saturday, August 22, 2009 at 11:23pm
http://mathforum.org/library/drmath/view/56706.html

- Math -
**Reiny**, Sunday, August 23, 2009 at 12:01am
The odds in favour of event A is 3:1

so the prob of event A happening is 3/4

If the odds in favour of some event is a:b

then the prob of event A is a/(a+b) and the prob of the event not happening is b/(a+b)

Note a/(a+b) + b/(a+b)

= (a+b)/(a+b) = 1

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