If there are 800000 tickets, and I use 2000 tickets, what is the % of me winning?

Guest Jul 9, 2015

#2**0 **

If there is only ONE winning ticket, when you buy 1 ticket you have a 1/800000 chance of winning. Buy another ticket from the 79999 tickets remaining and you have a 1/79999 chance of winning....etc

So 1/800000 + 1/799999 + 1/799998 ..........1/798001 =

I think! Can anyone 2nd that?

Guest Jul 9, 2015

#4**0 **

Sorry, as 'Anonymous' poster it wouldn't let me post by 'pasting' the answer, but here it is

= .002503128651703143....

Guest Jul 9, 2015

#6**0 **

If there is one winning ticket then you have 2000 chances to win out of a possible 800000 tickets.

$${\frac{{\mathtt{2\,000}}}{{\mathtt{800\,000}}}}{\mathtt{\,\times\,}}{\mathtt{100}} = {\frac{{\mathtt{1}}}{{\mathtt{4}}}} = {\mathtt{0.25}}$$

That is 0.25% chance (exactly 1 chance in 400)

Melody Jul 10, 2015