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.