I got a 1976 and a 1992 correct on my only attempt. What are the odds of that? You can narrow a picture down to roughly a 20 yr span. Is that 1 in 400 for just

I got a 1976 and a 1992 correct on my only attempt. What are the odds of that? You can narrow a picture down to roughly a 20 yr span. Is that 1 in 400 for just those two? Worst case would be 100 x 100?