2018 (c)Shogo Baba
Turn a roulette with 10 numbers from 0 to 9 one hundred times and count how many times 9 appears. The probability of having 9 is 10%, which most likely appears 10 times in total.
ROULETTE: 1
9 appears: 1
9
2018
Appeared in the Bulletin "New-Method" No. 64