This is what chance means;

a possibility of something happening.

For example: "There is a chance of winning the raffle."

In this case, there is a criteria for that chance happening. It's like saying; "If you pick numbers between 1 to 10, there's a big chance you will win the raffle."

Note: I added a condition.

In your contest, you stated a condition already. Anyway, I just gave you a better statement to use. Stop trying to prove you are right, please?