You are writing a mathematics textbook, and one of the problems you write is the following:
âlet a be the set of moviegoers who like sci fi movies, let b be the set of moviegoers who like zombie apocalypse movies, and let c be the set of moviegoers who like childrenâs movies. express the following in symbols: the set of all moviegoers who like either sci fi movies or zombie apocalypse movies, but not childrenâs movies.â
(i) give the answer to the problem above.
(ii) the editor removes the comma in the last sentence and inserts a comma after âsci fi movies.â what effect, if any, does this have on the correct answer?
(iii) comment on what would happen if there were no commas in the last sentence