Probability Question(s)

(I knew I shouldive stayed awake in statistics class)

Let's say your school was holding a lottery, and the winner would recieve $100. The chances of winning the lottery with 1 ticket is only 1/50, BUT: What are the odds of winning if you use like 20 tickets?

>>10
no. The OR principle only works if the events are mutually exclusive: the question is if one of the tickets wins, but the way the problem is specified the person could buy two tickets with the same winning no. - thus making the events not mutually exclusive. thus >>2 is right.

This problem needs to be defined better for us to get the right answer.