perplexus.info :: Probability : A Coin Game

A Coin Game (Posted on 2004-05-20)

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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Subject	Author	Date
Solution	Math Man	2018-06-29 21:16:25
Puzzle Solution	K Sengupta	2009-02-26 15:31:58
No Subject	CharleyA.	2007-04-19 12:47:43
answer	K Sengupta	2007-03-09 05:07:21
Probability under a microscope	Carlos Da Peanut	2004-05-27 22:20:09
re: Solution	Popstar Dave	2004-05-23 02:59:13
Solution	Gururaj	2004-05-22 04:31:27
re: Assuming .5 solution	Charlie	2004-05-20 22:12:41
re: flip vs spin	Iain	2004-05-20 17:12:04
Assuming .5 solution	Jer	2004-05-20 14:19:31
Answer	Oskar	2004-05-20 14:17:57
flip vs spin	Jer	2004-05-20 14:08:34

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