How to find probability in a lottery?

Question

Hi guys! I have this project and it asks me to find the probability of winning a prize in this lottery called Princess Margaret. Here are the prizes and number of tickets sold:

Odds to win is 1/10

there's 10 grand prizes

Only 345,00 tickets sold

34,509 prizes in all - worth 13.2 million

What is the probability of winning a prize?

Note: So basically, im asking the probability of getting atleast a grand prize

Answer 1

I am making the following assumptions.

(1) The grand prize is the top prize, so the probability of "getting at least a grand prize" is equal to the probability of "getting a grand prize".

(2) When you said "Only 345,00 tickets sold" you meant "Only 345,000 tickets sold".

If those assumptions are correct the probability is

10/345,000 or 1/34,500