Re: Expected cutoff for dse ??

Posted by abcde on Jul 04, 2013; 6:18am
URL: http://discussion-forum.276.s1.nabble.com/Expected-cutoff-for-dse-tp7583160p7583197.html

there are 4 possibilities for your two letters: MM, MF, FM and FF. However, since the mailman delivers a female one first no matter what, the only three possibilities are actually MF, FM and FF. Of these, the other letter is from a male in 2 out of the three cases. Thus the answer is 1/3.