Exam 8: Sets and Logic

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Consider the sets. A=A = {letters in the word pills } B=B = {6} C=C = {p,i,e}\{ p , i , e \} D=D = {2+1}\{ 2 + 1 \} E=E = {three} F=F = {3} Which of the sets can be placed into a one-to-one correspondence with DD ?

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A

Draw a Venn diagram showing the sets AA BB and CC where AA is the set of people in a classroom with blue eyes, BB is the set of people in the classroom with black shoes, CC is the set of people in the classroom with wedding rings, and the universe is the set of people in the classroom. Assume that each region corresponds to a nonempty set.

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C

Write the negation of the statement. All cats have fleas.

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Some cats do not have fleas.

In a recent survey of 100100 women, the information was gathered: 5959 use shampoo A. 5252 use shampoo B. 3232 use shampoo C. 2323 use shampoos A and B. 1919 use shampoos A and C. 1212 use shampoos B and C. 1111 use all three. How many are not using any of the three listed shampoos (Region VIII)? A = {women who use shampoo A } B = {women who use shampoo B } C = {women who use shampoo C } Use the figure (with Regions I to VIII) to answer the question.  In a recent survey of  100  women, the information was gathered:  59  use shampoo A.  52  use shampoo B.  32  use shampoo C.  23  use shampoos A and B.  19  use shampoos A and C.  12  use shampoos B and C.  11  use all three. How many are not using any of the three listed shampoos (Region VIII)? A = {women who use shampoo A } B = {women who use shampoo B } C = {women who use shampoo C } Use the figure (with Regions I to VIII) to answer the question.   __________ women __________ women

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How many subsets does the set {a,e,i,c,u}\{ a , e , i , c , u \} have?

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Draw a Venn diagram showing the sets AA BB and CC where AA is the set of natural numbers, BB is the set of integers, CC is the set of rational numbers, and the universe is the set of real numbers. Assume that each region corresponds to a nonempty set.

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Let U=\{1,2,3,4,5,6,7,8,9,10\} A=\{2,4,6,8\} B=\{5,7\} C=\{2,5,6,7,10\} List all the members of the set. A(BCˉ)A \cap ( B \cap \bar { C } )

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In a recent survey of 100100 women, the following information was gathered: 5858 use shampoo A. 5151 use shampoo B. 3232 use shampoo C. 2121 use shampoos A and B. 1919 use shampoos A and C. 1414 use shampoos B and C. 1212 use all three. How many are using shampoo C only (Region III)? A = {women who use shampoo A } B = {women who use shampoo B } C = {women who use shampoo C } Use the figure (with Regions I to VIII) to answer the question.  In a recent survey of  100  women, the following information was gathered:  58  use shampoo A.  51  use shampoo B.  32  use shampoo C.  21  use shampoos A and B.  19  use shampoos A and C.  14  use shampoos B and C.  12  use all three. How many are using shampoo C only (Region III)? A = {women who use shampoo A } B = {women who use shampoo B } C = {women who use shampoo C } Use the figure (with Regions I to VIII) to answer the question.   __________ women __________ women

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Let U=\{1,2,3,4,5,6,7,8,9,10\} A=\{2,4,6,8\} B=\{5,7\} C=\{2,5,6,7,10\} List all the members of the set. ABCA \cap \overline { B \cup C }

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Specify the set by roster. {letters in the word son }

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If \varnothing has a cardinality, what is it? Explain.

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In a recent survey of 100100 women, the following information was gathered: 5454 use shampoo A. 5252 use shampoo B. 3535 use shampoo C. 2222 use shampoos A and B. 1818 use shampoos A and C. 1313 use shampoos B and C. 1212 use all three. Name the three sets in this survey A , B , and C . Use the figure (with Regions I through VIII) to answer the question.  In a recent survey of  100  women, the following information was gathered:  54  use shampoo A.  52  use shampoo B.  35  use shampoo C.  22  use shampoos A and B.  18  use shampoos A and C.  13  use shampoos B and C.  12  use all three. Name the three sets in this survey A , B , and C . Use the figure (with Regions I through VIII) to answer the question.

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Let U=\{1,2,3,4,5,6,7\} A=\{4,5,6,7\} B=\{2,3,5,7\} C=\{4,6,7\} List all the members of the set. Aˉ\bar { A }

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Translate the given statement into words. (pq)\sim ( p \vee q ) Let p: Lizards have a shell; q: Lizards eat bugs.

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Give the numbers of elements in the region marked I in the figure. U=500,A=160,B=170,C=65,AB=20| U | = 500 , | A | = 160 , | B | = 170 , | C | = 65 , | A \cap B | = 20 AC=55,BC=20,ABC=20| A \cap C | = 55 , | B \cap C | = 20 , | A \cap B \cap C | = 20  Give the numbers of elements in the region marked I in the figure.  | U | = 500 , | A | = 160 , | B | = 170 , | C | = 65 , | A \cap B | = 20   | A \cap C | = 55 , | B \cap C | = 20 , | A \cap B \cap C | = 20

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Let U=\{1,2,3,4,5,6,7\} A=\{1,2,4,5\} B=\{1,2,3,6\} C=\{4,6,7\} List all the members of the set. ABA \cup B

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Draw a Venn diagram showing the sets AA BB and CC where AA is the set of flowers, BB is the set of flagpoles, 66 is the set of pencils, and the universe is the set of objects. Assume that each region corresponds to a nonempty set.

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How many subsets are there in a set with pp elements?

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Let U=\{1,2,3,4,5,6,7,8,9,10\} A=\{2,3,5,6,7\} B=\{4,5,6,7,8\} List all the members of the set. Aˉ\bar { A }

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Do the following sets have the same cardinality? {48, 49, 50, ..., 818, 819} {485, 487, 489, ..., 1,969, 1,971} ______________________________ ( They have the same cardinality . / They do not have the same cardinality .)

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