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A Coin Game (Posted on 2004-05-20) Difficulty: 3 of 5
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?

See The Solution Submitted by Brian Smith    
Rating: 3.5000 (4 votes)

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Solution Solution | Comment 6 of 12 |

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
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