14. The following data were given in a study of a group of 1000 subscribers to a certain magazine: In reference to job, marital status, and education, there were 312 professionals, 470 married persons, 525 college graduates, 42 profes-

sional college graduates, 147 married college graduates, 86 married profes-

sionals, and 25 married professional college graduates. Show that the numbers reported in the study must be incorrect.