© Tefko Saracevic 1 Exercise: Logical operators Boolean search statements and Venn diagrams.

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© Tefko Saracevic 1 Exercise: Logical operators Boolean search statements and Venn diagrams

© Tefko Saracevic2 Directions Slide 4 provides a Venn diagram with numbered sets and a number of search statements –for each statement shade the appropriate set or sets –e.g. for (A OR B) AND C the sets are 4, 5, 6 Slide 5 is for practice Slide 6 has the answers –BUT NOTE: one of the answers is WRONG! Which one?

© Tefko Saracevic3 Order of operations Rules for the order in which operations are done effect the answer - so follow them DIALOG order of operation is: 1. First are done all operations that are in parentheses, then: 2. (W), (N), (S), (L), or (F) 3. NOT 4. AND 5. OR e.g. for A OR B AND C –first is done B AND C –and then A OR the results of B AND C –thus this is the same as A OR (B AND C)

© Tefko Saracevic4 Exercise: shade Venn diagrams AB C 1. A AND B 2. A OR B 3. A OR B AND C 4. (A OR B) AND C 5. A AND B NOT C 6. A AND (B NOT C) 7. (A AND B) NOT C 8. (A NOT B) AND C 9. A NOT (B AND C) 10. A NOT B AND C 11. A AND (B OR C) 12. A AND B OR C 13. A OR (B AND C) 14. A OR B OR C 15 A AND B AND C

© Tefko Saracevic A B C Practice page

© Tefko Saracevic6 1. A AND B2,5 2. A OR B1,2,3,4,5,6 3. A OR B AND C1,2,4,5,6 4. (A OR B) AND C4,5,6 5. A AND B NOT C2 6. A AND (B NOT C)2 7. (A AND B) NOT C2 8. (A NOT B) AND C4 9. A NOT (B AND C)6 10. A NOT B AND C4 11. A AND (B OR C)2,4,5 12. A AND B OR C2,4,5,6,7 13. A OR (B AND C)1,2,4,5,6 14. A OR B OR C1,2,3,4,5,6,7 15 A AND B AND C AB C Venn diagrams: solutions p.s. one of them is wrong!

© Tefko Saracevic7 well… it is a Venn diagram too from angelfire.comangelfire.com

© Tefko Saracevic8 description This Venn diagram is color-coded in order to demonstrate the way in which the layers overlap--if you are not familiar with the way colors are mixed subtractively just enjoy all the pretty colors. Not all Venn diagrams are color-coded. Each circle is clearly labeled with the name of a character in bold letters. The qualities of that character are then written in that circle. Some qualities are in an area where two circles overlap because both characters share those qualities. For instance, both the Tazmanian Devil and Wile E. Coyote are mammals, so "mammal" goes in the purple area where the circles of the two characters overlap. In the center, all the circles overlap; qualities in this area this are shared by all three characters. For instance, Elmer Fudd, Wile E. Coyote, and the Tazmanian Devil were all in the movie Space Jam, so "Space Jam is written in the area where all the circles overlap.