Problem: A coin is repeatedly flipped. What is the expected number of flips to get two heads in a row?  heads in a row?
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I will be out of town for the next four days, so have fun with the problem!
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April 19th, 2007 at 10:36 pm
four times for the two heads in a row
and… 2n for n heads in a row
wahhhhhhh
so ur at stanford?? u miss out on concessions… MOOO
April 20th, 2007 at 10:06 am
Yeah, I’m at Stanford right now. And both of your answers are wrong =P.
April 20th, 2007 at 10:20 am
Xuan, those answers are correct for n heads total, but it takes a lot more effort to get them all in a row.
Anyway, the recursion for n looks really ugly…
April 26th, 2007 at 1:11 pm
Another Day, Another Post
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