A letter submitted to the editor of a national newsmagazine was written and signed by a Dr  Shirley Martin who, in the text of the letter, mentions being a professor at a major North American medical school
Knowing that fewer than 5 percent of the professors at such schools are women, the editor reasons that the chances are better than 19 to 1 that the letter was written by a man
Fewer than 1 in 20 of the manuscripts submitted to Argon Publishing Co. are accepted for publication. Since only 15 manuscripts were submitted last week, there is almost no chance that any of them will be accepted for publication.