Pinellas County is a county located in the state of Florida. As of the 2010 census, the population was 916,542. Its county seat is Clearwater, and its largest city is St. Petersburg. Pinellas County is included in the TampaâSt. PetersburgâClearwater, Florida Metropolitan Statistical Area.
Nowadays, we can say in plain English: A set is a well defined collection of objects. The elements or members of a set can be anything: numbers, characters, words, names, letters of the alphabet, even other sets, and so on.
Intuitive picture. A finite set is like a deck of cards in a box. You can reach in and pull out another card N times, but the N+1st time you won't get a card. Not complicated, but you do have to keep track of N. An infinite set is like a box that always has another card.