<PRE><B>Question 325234</B>
The probability of winning $20 in a particular lottery is 0.01. What is the probablity that you will get at least one $20 winner if you buy 90 tickets. 
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Binomial Problem with n = 90 and p = 0.01
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P(at least one winner) = 1 - P(no winners)
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P(at least one) = 1 - (0.99)^90 = 1- 0.4047 = 0.5953
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Cheers,
Stan H.</PRE>