Little math problem(s) February 2019

[ijabbott]

(02-21-2019 04:42 AM)lrdheat Wrote:  Example of my misunderstanding of this problem...from the viewpoint of the 40% probability of a win on a given try player, just a best of 41 would be sufficient for at least 90% of the distribution to lie below 20 games won (and fail to win the tourney). What am I missing here?

There is an off-by-one error in the above. You want at least 90% to lie below 21 games won (i.e. <= 20 games won).