Raffle ticket odds, does buying say 10 out of 28,000, give you 1/2800 chance on every ticket or 1/28000?
In: Mathematics
The odds of a favorable occurrence are dependent on how many possibilities there are and how many are favorable. Since we don’t care which ticket wins, we add the probabilities of any given ticket winning. If there are 28,000 tickets, and you have 10 of them, your odds are 1/28000 * 10 or 1/2800. That’s the odds of ANY of your tickets winning. The odds increase if there’s multiple drawings, like if there were 3 prizes, your odds of winning at least once are slightly more than tripled, since your odds are 1/28000 + 1/27999 + 1/27998 (since we have to account for previous winners) but your odds would be slightly greater than 3/28000 or roughly 1/9333.33.
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