Re: Discussion Problem_ (2)

Posted by Erika on Jun 14, 2013; 1:44pm
URL: http://discussion-forum.276.s1.nabble.com/Discussion-Problem-2-tp7579991p7582332.html

Hi duck

I did Q 3 differently although the ans is the same. I am putting it here so you could tell me if its wrong. In that case I would go with your method for any other similar ques. Tnx.

P(A=Head comes up) =1/4+ 2/4 + 3/4 + 4/4 = 10/4

P(B= 2nd coin was flipped) =1/4

P(A intersection B) = 2/4 (which is 2nd coin's prob of producing head)

So, reqd prob = 2 / 4
                        -----
                        10/4

=1/5