Hey guys.

If you have for example 1000 lottery tickets, 990 with no winnings and 10 lottery tickets with winnings, and you buy 3 lottery tickets.

How do you figure out the probability of winning?

If it was only 1 ticket bought it would be easy, but you have to figure out the modified winning chance per ticket bought?

Math is my bane in life :P Really need some help on what formula to use.