Odds required for this problem

About 99.9%, if I'd had a few pints I might drop one.

15504

15503/1

If the numbers are replaced after each pick then it's (1/20)^5. If not then its (1/20)*(1/19)*(1/18.......

If the numbers are replaced after they're drawn that's 3,200,000 in decimal odds- so if you can lay at the odds suggested above I'd say fill your boots.

wait- sorry, it depends on the rules. My answer is only correct if you have to pick them in the right order (Ie pick, draw, pick draw). Otherwise others got it right. As Americans say- My bad.

aye robot, ever heard the old saying, "think before you speak"? in your case it needs altering to
think before you type