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    "to win, a contestant must correctly select four numbers from the numbers 1-15 inclusive. What is the probability that John wins if he buys 1 ticket?'

    I think the answer will be something over 15choose4 (which is 150150)
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    You're almost there - there's 15 choose 4 possible combinations but only 1 of them is a winner. So the probability of winning is 1 over (15 choose 4)
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    (Original post by ttoby)
    You're almost there - there's 15 choose 4 possible combinations but only 1 of them is a winner. So the probability of winning is 1 over (15 choose 4)
    makes sense, thanks.
 
 
 
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