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September 3rd, 2008, 09:04 PM   #1
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Probabilty of consecutive heads/tails in weighted coin toss

Hi,

Can someone please help with this. I keep getting different answers to this from different people.

Supposing you have a weighted coin which lands heads up 70% of the time and tails up 30% of the time.

Q. What is the probability that it lands on tails 20 or more times in a row if I did this 1000 times?

*Also could I have the equation on how you worked this out so that I can change the weighting, number of trials etc (I need to know this for my business!!!)

Thank you very much.

Zak
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September 4th, 2008, 06:13 AM   #2
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Re: Probabilty of consecutive heads/tails in weighted coin toss

http://mathworld.wolfram.com/Run.html
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