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 20040522 04:31:27 