There is also smth I don't understand with freebitco.in's calculation of lottery win chance.
It says there is a 0.0011065% chance to win with my 260 tickets but when I do 260/235.000.000 I get 0.000001106, x100 and it is 0.0001106%.
As, there are 10 winners in the lottery, 0.00011% is multiplied by 10.
The formula which is used to calculate the chance of winning in the lottery is:
Chance of winning the lottery = ( ( your tickets / total tickets ) * 10 ) * 100%
That's how freebitco calculates chance of winning. But that's not accurate. Because no one can win more than one prize.
So what happens here is,
I have 0.0001106% chance to win the 1st slot but since there are 10 slots, I get 10 tries. I participate again and again till I win a slot or all 10 slots are gone.
Random roll #1 > 260 tickets, chance to win a slot is ~0.0001106%
Random roll #2 > 260 tickets, chance to win a slot is ~0.0001106%
Random roll #3 > 260 tickets, chance to win a slot is ~0.0001106%
...
Random roll #8 > 260 tickets, chance to win a slot is ~0.0001106%
Random roll #9 > 260 tickets, chance to win a slot is ~0.0001106%
Random roll #10 > 260 tickets, chance to win a slot is ~0.0001106%
That's why it is ~0.001106%...
Starting from 2nd round, you should remove the winners from the participants list etc etc, its just a rounding error at this point nobody will notice 9 people out of 235 million. :p