Lecture on Set

Set A collection of objects. Example: The set of all even natural numbers less than 10 is {2, 4, 6, 8} GO BACK

Mnemonic Device A tool for remembering information easily, it can be a rhyme, song picture, or acronym. Example: A mnemonic device for remembering to spell dessert with two s’s, is to think of the dessert S trawberry S hortcake GO BACK

Remember… U = the set of all students in the classset M = the set of students who watch MTVset G = the set of students who watch MTVset GO BACK

Remember… means intersection, or the overlapping of two sets. GO BACK

Remember… means union, or the joining together of two sets. GO BACK

Sherlock Holmes Info Page From the website In a sea of fictional detectives that includes the greats, the near- greats, and a great many wannabes, the lighthouse that shines above them all is, of course, Sherlock Holmes. Created by Sir Arthur Conan Doyle and presented through the narration of the fictional Dr. Watson, Holmes is the most brilliant detective ever. His powers of observation seem supernatural until he utters the famous phrase, “Elementary, my dear Watson,” and proceeds to enumerate the logical steps that have brought him to a prescient conclusion. The most innocuous detail can lead Holmes to profound revelations. GO BACK

U M G There is another way to refer to the students who JUST watch MTV or JUST play video games. We use subtraction! The blue area, MTV only students, is the same as M-G, because all of circle G, the green and yellow areas, gets subtracted out. Same thing with the yellow area, video game only students. It is the same as G-M.