If you buy a school raffle ticket for $1, your overall probability of winning at least one of the prizes is 0.04. You can improve your odds of winning something by buying two tickets. What is the probability that one or the other of your tickets will win something?

Question

perl · Answer

this is a binomial problem
we are interested in the follow 3 cases 
ticket 1 = win  ticket 2 = win     
ticket 1 = win  ticket 2 = lose
ticket 1 = lose ticket 2 = win

perl · Answer

so its easier to ask, what is the probability of not winning at all, then subtract that from 1 . 
1 - .96*96 = .0784