Set theory is one of the widely used concepts in day to day business dealings. Due to its wide used, it has attained a crucial importance in business mathematics. It allows categorizing different elements or members in one set in a manner that each member has some common characteristics with the rest of the group. The set theory has allowed business managers to handle complex and fragmented pieces of information in organized and easily understandable sets which quicken various processes involved. An important concept of set theory is functions which defines the relationship between ...