Exam 2: The Basic Concepts of Set Theory

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Solve the problem. -Mrs. Bollo's second grade class of thirty students conducted a pet ownership survey. Results of the survey indicate that 8 students own a cat, 15 students own a dog, and 5 students own both a cat and A dog. How many of the students surveyed own only a cat?

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Find the cardinal number of the indicated set. Use the cardinal number formula. -If n(A)=20,n(A∪B)=58n ( A ) = 20 , n ( A \cup B ) = 58 , and n(A∩B)=16n ( A \cap B ) = 16 , find n(B)n ( B ) .

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Draw an appropriate Venn diagram and use the given information to fill in the number of elements in each region. - n(U)=52,n(A)=28,n(A∩B)=4,n(B′)=28\mathrm { n } ( \mathrm { U } ) = 52 , \mathrm { n } ( \mathrm { A } ) = 28 , \mathrm { n } ( \mathrm { A } \cap \mathrm { B } ) = 4 , \mathrm { n } \left( \mathrm { B } ^ { \prime } \right) = 28

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Find the cardinal number of the set. - Given: start text end text n(U)=60 n(A)=35 n(B)=20 n(A∩B)n ( A \cap B ) =4 Find n(A∪B)′n ( A \cup B ) ^ { \prime } .  Find the cardinal number of the set. - Given:   \text { } \begin{aligned} & n ( U ) = 60 \\ & n ( A ) = 35 \\ & n ( B ) = 20 \\ \end{aligned}   n ( A \cap B )  =4 Find  n ( A \cup B ) ^ { \prime } .

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Complete the blank with either ∈\in or ∉\notin to make the statement true. - {−5}....{−4−3,−3−3,−2−3,−1−3}\{ - 5 \} .... \{ - 4 - 3 , - 3 - 3 , - 2 - 3 , - 1 - 3 \}

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Let U = {all soda pops}, A = {all diet soda pops}, B = {all cola soda pops}, C = {all soda pops in cans}, and D = {all caffeine-free soda pops}. Describe the set in words. - A∩BA \cap B

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Solve the problem. -A committee is to be formed. Possible candidates for the committee are Eric, Frances, Greg, and Jose. Denoting these four people by e, f, g, j, list all possible committees of two people (ie list all Possible subsets of size two).

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Write true or false for the following statement. Let A=\{3,5,7,9,11,13\} B=\{3,5,9,11\} C=\{5,9,13\} -Every element of C is also an element of A.

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The lists below show five agricultural crops in Alabama, Arkansas, and Louisiana. soybeans (s) soybeans (s) soybeans (s) peanuts (p) rice (r) sugarcane (n) corn (c) cotton (t) rice (r) hay (h) hay (h) corn (c) wheat (w) wheat (w) cotton (t) Let U be the smallest possible universal set that includes all of the crops listed, and let A, K and L be the sets of five crops in Alabama, Arkansas, and Louisiana, respectively. Find each of the following sets. - K∪L\mathrm { K } \cup \mathrm { L }

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Write a description of the shaded region using the symbols A, B, C, ∪\cup , ∩\cap , -, and ' as needed. - Write a description of the shaded region using the symbols A, B, C,   \cup ,   \cap , -, and ' as needed. -

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Find the number of subsets of the set. - {x∣x\{ x \mid x is an even number between 11 and 27}27 \}

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Tell whether the statement is true or false. -(9 + 17, 15 + 17)= (9, 15)

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Determine whether the statement is true or false. Let A={1,3,5,7}A = \{ 1,3,5,7 \} B=\{5,6,7,8\} C=\{5,8\} D=\{2,5,8\} U=\{1,2,3,4,5,6,7,8\} - D⊆BD \subseteq B

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List the elements in the set. - {x∣x\{ x \mid x is an even integer smaller than 8}8 \}

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Determine whether the sets are equal, equivalent, both, or neither. - {110,210,310}\left\{ \frac { 1 } { 10 } , \frac { 2 } { 10 } , \frac { 3 } { 10 } \right\} and {0.1,0.2,0.3}\{ 0.1,0.2,0.3 \}

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Write the set in set-builder notation. - {17,18,19,20}\{ 17,18,19,20 \}

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Show that the set has cardinal number  Show that the set has cardinal number    by establishing a one-to-one correspondence between the set of counting numbers and the given set. Be sure to show the pairing of the general terms in the sets. - \{ 4,8,12,16 , \ldots \} by establishing a one-to-one correspondence between the set of counting numbers and the given set. Be sure to show the pairing of the general terms in the sets. - {4,8,12,16,…}\{ 4,8,12,16 , \ldots \}

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Find the number of proper subsets of the set. -{car, boat, truck, train}

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 Use ⊂ or ⊄ in the blank to make a true statement. \text { Use } \subset \text { or } \not \subset \text { in the blank to make a true statement. } - {e,n,j}…{e,e,n,n,j,j}\{ e , n , j \} \ldots \{ e , e , n , n , j , j \}

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Determine whether the statement is true or false. Let A={1,3,5,7}A = \{ 1,3,5,7 \} B=\{5,6,7,8\} C=\{5,8\} D=\{2,5,8\} U=\{1,2,3,4,5,6,7,8\} - C⊈AC \nsubseteq \mathrm { A }

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