the probability of one success is 720^(1/8), so it should take 720^(13/8) tries, which is about a month. However, the fact that they could line themselves up for the last one just by pressing up and down, and not risking having to start over will make a huge difference.
the probability of one success is 720^(1/8), so it should take 720^(13/8) tries, which is about a month. However, the fact that they could line themselves up for the last one just by pressing up and down, and not risking having to start over will make a huge difference.