Every week you buy a ticket in a lottery that offers one chance in a million of winning. What is the chance that you never win, even if you keep playing for 10 years? P(you win) = 1/1000000 = 0.000001 p(you do not win) = 1 - P(you win) = 0.999999 P(you do not win for 10 years) = P(you do not win)^(52*10) = 0.9994801 = 99.95%