dse 2014 problem

Posted by leon on Apr 09, 2015; 2:38pm
URL: http://discussion-forum.276.s1.nabble.com/dse-2014-problem-tp7596100.html

Am stuck with this one

There are two fair coins. Coin 1 is tossed 3 times. Let x be the no of heads that occur. After this coin 2 is tossed x times. Let y be the no of heads we get with coin 2. prob(x>=2|y=1) equals