Join Date: Jan 2009
Posts: 4,987
If you're asking for the probability of losing 80% or more coinflips (50% winning chance) in 250 trials, it never happened; well, lets say it almost certainly never happened.
The probability is on the order of 10^-22. That's a decimal with 22 zeros before a 1.
Obtained from the binomial distribution; in Excel, it is Binomdist(50,250,0.5,True), which is the probability of 50 or fewer wins.
