



 
This is a question that is more easily answered by the pessimists than by the optimists: Assume the chances of LOSING the lottery are 999 in 1000. Claude
This question cannot be answered without more information. If you are buying independent tickets on separate lotteries so that the odds of winning on different tickets are independent, you would need tickets. However, you would have a nonzero chance of winning more than once. If you play until you win for the first time, and average your total number of plays over many tries, the situation is governed (to a good approximation) by the exponential distribution and again the mean is 500. Good Hunting  and remember the house always wins in the long run!  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 