Exam 7: Sets and Counting

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If 8 persons meet at a reunion and each person shakes hands exactly once with each of the others, what is the total number of handshakes ?

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Let S=\{ Apple, Dell, Gateway, Pomegranate, Compaq \} B=\{ Apple, Dell, Pomegranate, Compaq \} G=\{ Compaq \} Q=\{ Compaq \} Use a Venn diagram to determine the relationships among the sets.

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List the elements in the set D, such that D={nn is a positive integer and 0<n<7}D = \{ n \mid n \text { is a positive integer and } 0 < n < 7 \}

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Find how many outcomes are possible for the decision algorithms. Step 1 Step 2 Alternative 1: 1 outcome Alternative 1:1 outcome Alternative 2:1 outcome Alternative 2:1 outcome Alternative 3:2 outcomes

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The following table shows the amount spent, in billions of dollars, on recreational boats and accessories in the United States during the period 1999-2001. (Let S be the set of all dollars represented in the table.) Compute the cardinality of the set described as n(A(NU))n ( A \cap ( N \cup U ) ) . Used Boats, New Boats, Accessories, Total 6 8 2 16 6 6.5 4 16.5 6 8 2 16 Total 18 22.5 8 48.5

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Find how many outcomes are possible for the decision algorithms. Step 1 Step 2 Alternative 1:1 outcome Alternative 1:2 outcomes Alternative 2: 1 outcome Alternative 2:2 outcomes Alternative 3:2 outcomes ​ __________ outcomes

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If n(A)=37n ( A ) = 37 , n(B)=25n ( B ) = 25 , and n(AB)=5n ( A \cap B ) = 5 , find n(AB)n ( A \cup B ) .

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You are searching for Hip-hop music that is neither American nor Dutch. In set notation, for which subset of music files are you searching

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Let A=\{ June, Justine, Solly, Polly \} B=\{ Justine, Polly, Jelly \} C=\{ Ruth, Justine, Polly \} Find the set A(BC)A \cup ( B \cup C ) .

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Let C=\{ red, green \} N=\{ circle, square \} List the elements of C×NC \times N as ordered pairs in a set notation.

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Rather than study for math, you and your buddies decide to get together for a marathon movie-watching popcorn-gorging event on Saturday night. You decide to watch four movies selected at random from the list. How many sets of four movies are possible Name Revenue (\ million) The Grudge \ 9.24 Ray \ 6.54 The Forgotten \ 6.01 Friday Night Lights \ 5.99 Cellular \ 5.85 Shall We Dance \ 5.82 The Village \ 5.58 AVP: Alien Vs. Predator \ 5.46 Catwoman \ 5.10 Sky Captain and the World of Tomorrow \ 5.09

(Multiple Choice)
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The following table shows the amount spent, in billions of dollars, on recreational boats and accessories in the United States during the period 1999-2001. (Let S be the set of all dollars represented in the table.) Compute the cardinality of the set described as n(NC)n ( N \cap C ) . Used Boats, New Boats, Accessories, Total , 7 5 2 14 , 7 7.5 3 17.5 , 6 9 4 19 Total 20 21.5 9 50.5

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Evaluate 8!7!\frac { 8 ! } { 7 ! } .

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A surgical procedure requires choosing among three alternative methodologies. The first methodology can result in 7 possible outcomes, the second in 6 possible outcomes, and the third in 2 possible outcomes. What is the total number of outcomes possible ?

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A computer "byte" consists of 8 "bits", each bit being either a 0 or a 1. If characters are represented using a code that uses 4 bytes for each character, how many characters can be represented ? __________ characters

(Short Answer)
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Evaluate P(7,5)P ( 7,5 ) . ​ P(7,5)P ( 7,5 ) __________

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Use a Venn diagram or some other method to obtain a formula for n(ABC)n ( A \cup B \cup C ) in terms of n(A)n ( A ) , n(B)n ( B ) , n(C)n ( C ) , n(AB)n ( A \cap B ) , n(AC)n ( A \cap C ) , n(BC)n ( B \cap C ) , and n(ABC)n ( A \cap B \cap C ) .

(Multiple Choice)
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The following table shows the results of a survey of authors by a fictitious publishing company. New Authors Established Authors Total Successful 4 25 29 Unsuccessful 9 55 64 Total 13 80 93 ​ Consider the following subsets of the set S of all authors represented in the table: C, the set of successful authors; U, the set of unsuccessful authors; N, the set of new authors; and E, the set of established authors. Find the number of elements that set CNC \cap N ^ { \prime } contains. n(CN)=n \left( C \cap N ^ { \prime } \right) = __________

(Short Answer)
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The "Dogs of the Dow" refer to the stocks listed on the Dow with the highest dividend yield. The table shows the top ten stocks of the "Dogs of the Dow" list in February, 2005. You decide to make a small portfolio consisting of a collection of six of the top ten Dogs of the Dow. Symbol Company Price Yield SBC SBC Communications 23.62 5.46\% GM General Motors 36.64 5.46\% MRK Merck 28.02 5.42\% MO Altria 63.20 4.62\% VZ Verizon 35.68 4.32\% JPM JP Morgan Chase 37.00 3.68\% C Citigroup 48.38 3.64\% PFE Pfizer 24.35 3.12\% DD DuPont 47.23 2.96\% GE General Electric 35.75 2.46\% How many portfolios are possible ? __________ portfolios How many of these portfolios contain SBC but not MO ? __________ portfolios How many of these portfolios contain at most one stock priced above $40 ? __________ portfolios

(Short Answer)
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Let A={ Dirk, Tina, Frans, Marie }A = \{ \text { Dirk, Tina, Frans, Marie } \} , B={ Frans, Marie, Tina, Klaas, Henrika }B = \{ \text { Frans, Marie, Tina, Klaas, Henrika } \} , C={ Dirk, Frans }C = \{ \text { Dirk, Frans } \} . Find n(A(BC))n ( A \cup ( B \cap C ) ) . ​ n(A(BC))=n ( A \cup ( B \cap C ) ) = __________

(Short Answer)
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