Alex flips a fair coin 20 times. Bert spins a fair coin 21 times. Bert wins if he gets more heads than Alex, else Alex wins. Note that Alex wins if there is a tie. What is the probability that Bert wins?

I found out the solution to be 0.5.

I calculated probabilities of all possible events for atleast half an hour & then added them all to get the answer exactly 0.5.

Posted by Gururaj on 2004-05-22 04:31:27