Re: DSE 2013 Answer Key is posted

Posted by phelps.phan on May 27, 2014; 10:17am
URL: http://discussion-forum.276.s1.nabble.com/DSE-2013-Answer-Key-is-posted-tp7590583p7590772.html

Thanks Subhayu.
For Q 41: Isn't P(AnB)=0 for disjoint events as AnB={}? If so, both P(A) and P(B) have positive probabilities would mean P(A).P(B) != P(AnB)=0 which means they cannot be independent(ans c). If A and B are independent besides being disjoint, only one of them has a positive probability, and the other 0. So either P(A) or P(B) is zero. I think this goes with the answer(option c) posted by Amit sir. This is what I've been trying to clarify.