Haunting 21

Today I went to the clinic to check on that leech bite I had at Triplex. I had to take numbers and wait for my turn and I had to take two. The two numbers were 1121 and 5211. What's the probability for one person to get the number 21 in both papers? I don't care, too lazy to do the math. The point is, I'm haunted by the number 21. Hah. I think I said this before last year.