see also: https://math.stackexchange.com/questions/1799767/63-chance-of-event-happening-over-repeated-attempts/1799784 https://math.stackexchange.com/questions/

see also: https://math.stackexchange.com/questions/1799767/63-chance-of-event-happening-over-repeated-attempts/1799784 https://math.stackexchange.com/questions/1799767/63-chance-o...