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    Dzmsmith's Avatar
    Dzmsmith Posts: 1, Reputation: 1
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    #1

    Mar 4, 2012, 09:48 AM
    Raffle odds calculations?
    If a raffle sells 40,000 tickets, which are replaced, and has 5 drawings for a total of 119 prizes... what are my odds my 1,2 and 3 tickets purchased? Thank you
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Mar 5, 2012, 06:42 AM
    Please clarify - are you saying that each "drawing" consists of pulling 119 tickets? Or does each drawing have one winning ticket which gets 119 prizes? Also - you indicate that tickets are replaced - are they replaced after each of the 5 drawings, or are they replaced after each ticket is pulled?

    If there are a total of 119 tickets being pulled (one for each prize) then the odds of any one ticket winning a prize is 119/40000 = 0.2975%, or about 1 in 336. If you buy n tickets your odds of winning a prize is n times 0.02975%. So for 2 tickets it's 0.595% (1 in 168) and for three tickets 0.8925%, or about 1 in 112.
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