<PRE><B>Question 230049</B>
A die contains the outcomes 1,2,3,4,5,6.


Of these numbers 2,3, and 5 are prime numbers, so the number of favorable outcomes is 3, the number of unfavorable is 3.  


Odds against is a ratio of UNFAVORABLE to FAVORABLE, or 3 to 3.  This reduces to 1 to 1 odds against. 


Dr. Robert J. Rapalje</PRE>