Exam 8: Sets and Logic

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Specify the set by description. {101,102,103,,190}\{ 101,102,103 , \ldots , 190 \}

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The expression ~ ( ~ p ) may be replaced by p.

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Translate the given statement into words. pq\sim p \cup q Let p: Turtles have a shell; q: Turtles eat bugs.

(Short Answer)
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Let N={2,3,4,5},S={ whole numbers between 1 and 6},L={a,b,c,d}N = \{ 2,3,4,5 \} , \quad S = \{ \text { whole numbers between } 1 \text { and } 6 \} , L = \{ a , b , c , d \} The cardinality of S is 6.

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In a recent survey of 100100 women, the following information was gathered: 5454 use shampoo A. 5353 use shampoo B. 3131 use shampoo C. 2121 use shampoos A and B. 1717 use shampoos A and C. 1313 use shampoos B and C. 99 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 following information was gathered:  54  use shampoo A.  53  use shampoo B.  31  use shampoo C.  21  use shampoos A and B.  17  use shampoos A and C.  13  use shampoos B and C.  9  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.

(Multiple Choice)
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The negation of the statement "All bears have fur." is "No bears have fur."

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A glazed doughnut contains 230 calories. Suppose you eat two doughnuts, and then decide to exercise to burn off the calories. Use the given table to list all possible sets of exercises that will burn off the calories in 1 hour. Exercise Calories/hr Walking 150 Biking 420 Jogging 500 Enter your answers in set notation using w for walking , b for biking , and j for jogging . If there is more than one correct answer, separate them with commas. If there is no such set, enter \varnothing .

(Short Answer)
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Let U=\{1,2,3,4,5,6,7,8,9,10\} A=\{2,3,4,5,6\} B=\{4,5,6,7,8\} List all the members of the set. ABA \cup B

(Multiple Choice)
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Write the negation of the statement. No turtles have fur.

(Short Answer)
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Is it possible for an argument to be valid even if it is nonsense?

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Use set notation to identify the shaded portion of the Venn diagram. Use set notation to identify the shaded portion of the Venn diagram.

(Short Answer)
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Use Venn diagrams to check the validity of the argument. No politicians are honest. Some dishonest people are found out. Therefore, some politicians are found out. __________ ( valid / not valid )

(Short Answer)
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A survey of 9,000 heads of household asked the following questions: Check the box if the answer is "yes". , My household has an Internet connection. , Someone in my household has a cell phone. If 4,350 of the households checked the first box, what percentage of the respondents have an Internet connection? __________% have an internet connection If 3,450 of the households checked the second box, what percentage of the respondents have a cell phone? __________% have a cell phone If 200 checked both boxes, what percentage of the households have both an Internet connection and a cell phone? __________% have an internet connection and a cell phone What percentage of the households have an Internet connection or a cell phone? __________% have an internet connection or a cell phone Round your answers to the nearest tenth of a percent.

(Short Answer)
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Answer the question and tell whether it illustrates inductive or deductive reasoning. Give the 6 th 6 \text { th } number in the pattern: 1+2=3 1+2+3=6 1+2+3+4=10 1+2+3+4+5=15 The 6 th 6 \text { th } number is __________. It illustrates __________ reasoning .

(Short Answer)
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Specify the set by description. {1,2,3,4,5}\{ 1,2,3,4,5 \}

(Short Answer)
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Give the numbers of elements in the region marked III in the figure. U=29,A=6,B=13,AB=4| U | = 29 , | A | = 6 , | B | = 13 , | A \cap B | = 4  Give the numbers of elements in the region marked III in the figure.  | U | = 29 , | A | = 6 , | B | = 13 , | A \cap B | = 4

(Multiple Choice)
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Write the negation of the statement. Some fish have gills.

(Short Answer)
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The following is a statement. The painting is beautiful.

(True/False)
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Consider the sets. A=A = {four} B=B = {s,l,i,p}\{ s , l , i , p \} C=\mathrm { C } = {letters in the word bush } D=D = {3+1}\{ 3 + 1 \} E=E = {5} F=F = {4} What is the cardinality of each set?

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

(Multiple Choice)
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