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Timeline for Flip a Fair Coin

Current License: CC BY-SA 3.0

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Apr 13, 2017 at 12:19 history edited CommunityBot
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Oct 23, 2014 at 11:32 comment added yo' +1 This is a very nice approach because it needs only the very basic about probabilistic theory.
Oct 22, 2014 at 16:24 comment added SQB @RobWatts Thank you, you pointed me in the right direction.
Oct 22, 2014 at 16:23 history edited SQB CC BY-SA 3.0
Corrected. It is 4.
Oct 22, 2014 at 16:15 comment added SQB @FlorianF By that logic, HH should be 4 as well.
Oct 22, 2014 at 15:52 comment added Florian F It should be 4. You need 2 tosses on average to get an H, then 2 more tosses to get a T.
Oct 22, 2014 at 14:24 comment added Rob Watts This doesn't quite work because when you get two heads you're not back to the original state, so you can't use $e$ to express the expected number of tosses from that point.
Oct 22, 2014 at 14:21 history answered SQB CC BY-SA 3.0