Mathematics: A Discrete Introduction
3rd Edition
ISBN: 9780840049421
Author: Edward A. Scheinerman
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 3.17, Problem 17.5E
To determine
The number handshakes that takes place when 20 people shakes hands with everyone exactly once.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
20 km, because
GISS
Worksheet 10
Jesse runs a small business selling and delivering mealie meal to the spaza shops.
He charges a fixed rate of R80, 00 for delivery and then R15, 50 for each packet of
mealle meal he delivers. The table below helps him to calculate what to charge
his customers.
10
20
30
40
50
Packets of mealie
meal (m)
Total costs in Rands
80
235
390
545
700
855
(c)
10.1.
Define the following terms:
10.1.1. Independent Variables
10.1.2. Dependent Variables
10.2.
10.3.
10.4.
10.5.
Determine the independent and dependent variables.
Are the variables in this scenario discrete or continuous values? Explain
What shape do you expect the graph to be? Why?
Draw a graph on the graph provided to represent the information in the
table above.
TOTAL COST OF PACKETS OF MEALIE MEAL
900
800
700
600
COST (R)
500
400
300
200
100
0
10
20
30
40
60
NUMBER OF PACKETS OF MEALIE MEAL
What is the answer in 10.3
Let X be a random variable with support SX = {−3, 0.5, 3, −2.5, 3.5}. Part ofits probability mass function (PMF) is given bypX(−3) = 0.15, pX(−2.5) = 0.3, pX(3) = 0.2, pX(3.5) = 0.15.(a) Find pX(0.5).(b) Find the cumulative distribution function (CDF), FX(x), of X.1(c) Sketch the graph of FX(x).
Chapter 3 Solutions
Mathematics: A Discrete Introduction
Ch. 3.14 - Write the following relations on the set 1,2,3,4,5...Ch. 3.14 - Prob. 14.2ECh. 3.14 - Prob. 14.3ECh. 3.14 - For each of the following relations on the set of...Ch. 3.14 - Prob. 14.5ECh. 3.14 - Prob. 14.6ECh. 3.14 - Prob. 14.7ECh. 3.14 - Prob. 14.8ECh. 3.14 - Prob. 14.9ECh. 3.14 - Prob. 14.10E
Ch. 3.14 - Prob. 14.11ECh. 3.14 - Prob. 14.12ECh. 3.14 - Prob. 14.13ECh. 3.14 - Prob. 14.14ECh. 3.14 - Prove: A relation R on a set A is antisymmetric if...Ch. 3.14 - Give an example of a relation on a set that is...Ch. 3.14 - Drawing pictures of relations. Pictures of...Ch. 3.15 - Prob. 15.1ECh. 3.15 - Prob. 15.2ECh. 3.15 - Prob. 15.3ECh. 3.15 - Prob. 15.4ECh. 3.15 - Prove: If a is an integer, then aa (mod 2).Ch. 3.15 - Prob. 15.6ECh. 3.15 - For each equivalence relation below, find the...Ch. 3.15 - Prob. 15.8ECh. 3.15 - Prob. 15.9ECh. 3.15 - Prob. 15.10ECh. 3.15 - Suppose R is an equivalence relation on a set A...Ch. 3.15 - Prob. 15.12ECh. 3.15 - Prob. 15.13ECh. 3.15 - Prob. 15.14ECh. 3.15 - Prob. 15.15ECh. 3.15 - Prob. 15.16ECh. 3.15 - Prob. 15.17ECh. 3.16 - Prob. 16.1ECh. 3.16 - How many different anagrams (including nonsensical...Ch. 3.16 - Prob. 16.3ECh. 3.16 - Prob. 16.4ECh. 3.16 - Prob. 16.5ECh. 3.16 - Prob. 16.6ECh. 3.16 - Prob. 16.7ECh. 3.16 - Prob. 16.8ECh. 3.16 - Prob. 16.9ECh. 3.16 - Prob. 16.10ECh. 3.16 - Prob. 16.11ECh. 3.16 - Prob. 16.12ECh. 3.16 - Prob. 16.13ECh. 3.16 - Prob. 16.14ECh. 3.16 - How many partitions, with exactly two parts, can...Ch. 3.16 - Prob. 16.16ECh. 3.16 - Prob. 16.17ECh. 3.16 - Prob. 16.18ECh. 3.16 - Prob. 16.19ECh. 3.16 - Prob. 16.20ECh. 3.17 - Prob. 17.1ECh. 3.17 - Prob. 17.2ECh. 3.17 - Prob. 17.3ECh. 3.17 - Prob. 17.4ECh. 3.17 - Prob. 17.5ECh. 3.17 - Prob. 17.6ECh. 3.17 - Prob. 17.7ECh. 3.17 - Prob. 17.8ECh. 3.17 - Prob. 17.9ECh. 3.17 - Prob. 17.10ECh. 3.17 - Prob. 17.11ECh. 3.17 - Prob. 17.12ECh. 3.17 - Prob. 17.13ECh. 3.17 - Prob. 17.14ECh. 3.17 - Prob. 17.15ECh. 3.17 - Consider the following formula: kkn=nk1n1. Give...Ch. 3.17 - Prob. 17.17ECh. 3.17 - Prob. 17.18ECh. 3.17 - Prob. 17.19ECh. 3.17 - Prob. 17.20ECh. 3.17 - Prob. 17.21ECh. 3.17 - Prob. 17.22ECh. 3.17 - Prob. 17.23ECh. 3.17 - Prob. 17.24ECh. 3.17 - Prob. 17.25ECh. 3.17 - Prove: 0nnn+1nn1n+2nn2n++n1n1n+nn0n=n2n.Ch. 3.17 - How many Social Security numbers (see Exercise...Ch. 3.17 - Prob. 17.28ECh. 3.17 - Prob. 17.29ECh. 3.17 - Prob. 17.30ECh. 3.17 - Prob. 17.31ECh. 3.17 - Prob. 17.32ECh. 3.17 - Prob. 17.33ECh. 3.17 - Prob. 17.34ECh. 3.17 - Prob. 17.35ECh. 3.17 - Prob. 17.36ECh. 3.17 - Prob. 17.37ECh. 3.18 - Prob. 18.1ECh. 3.18 - Prob. 18.2ECh. 3.18 - Prob. 18.3ECh. 3.18 - Prob. 18.4ECh. 3.18 - Prob. 18.5ECh. 3.18 - Prob. 18.6ECh. 3.18 - Prob. 18.7ECh. 3.18 - Prob. 18.8ECh. 3.18 - Prob. 18.9ECh. 3.18 - Prob. 18.10ECh. 3.18 - Prob. 18.11ECh. 3.18 - Prob. 18.12ECh. 3.18 - Prob. 18.13ECh. 3.18 - Prob. 18.14ECh. 3.18 - Prob. 18.15ECh. 3.18 - Prob. 18.16ECh. 3.18 - Prob. 18.17ECh. 3.18 - Prob. 18.18ECh. 3.18 - Prob. 18.19ECh. 3.19 - Prob. 19.1ECh. 3.19 - Prob. 19.2ECh. 3.19 - Prob. 19.3ECh. 3.19 - Prob. 19.4ECh. 3.19 - How many five-letter words can you make in which...Ch. 3.19 - This problem asks you to give two proofs for...Ch. 3.19 - Prob. 19.7ECh. 3.19 - Prob. 19.8ECh. 3.19 - Prob. 19.9ECh. 3.19 - Prob. 19.10ECh. 3.19 - Prob. 19.11ECh. 3.19 - Prob. 19.12ECh. 3 - Prob. 1STCh. 3 - Prob. 2STCh. 3 - Prob. 3STCh. 3 - Prob. 4STCh. 3 - Prob. 5STCh. 3 - Prob. 6STCh. 3 - Prob. 7STCh. 3 - Prob. 8STCh. 3 - Prob. 9STCh. 3 - Prob. 10STCh. 3 - Prob. 11STCh. 3 - Prob. 12STCh. 3 - Prob. 13STCh. 3 - Prob. 14STCh. 3 - Prob. 15STCh. 3 - Prob. 16STCh. 3 - Prob. 17STCh. 3 - Prob. 18STCh. 3 - Prob. 19STCh. 3 - Prob. 20STCh. 3 - Prob. 21STCh. 3 - Prob. 22ST
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- answerarrow_forward4 The plane 2x + 3y+ 6z = 6 intersects the coordinate axes at P, Q, and R, forming a triangle. Draw a figure and identify the three points on it. Also find vectors PQ and PR. Write a vector formula for the area of the triangle PQR and find its value.arrow_forward-10 M 10 y 5 P -5 R 5 -5 Ο 10 N -10 Οarrow_forward
- 1. Given the vector field F(x, y, z) = -zi, verify the relation 1 VF(0,0,0) lim +0+ volume inside S ff F• Nds S. where S, is the surface enclosing a cube centred at the origin and having edges of length 2€. Then, determine if the origin is sink or source.arrow_forwardA crate is supported by three cables as shown. Determine the weight of the crate knowing that the tension in cable AB is 750 lbarrow_forward+ 32 in. B 36 in. 40 in. A 60 in. X 27 in.arrow_forward
- Equilibrium Equations: Two-dimensional 2.28 Ra= Rc= 2.29 (change force to 600N) AC= AB= 2.33 CD= AC= DE= BC= Free Body Diagrams 2.34 Ax= Ay=_ Bx= By= 2.36 Ax= Ay= Bx= By= 2.37 (change middle force to 4000 lbs) Ay=_ Dx= Dy=_ 2.38 (change horizontal force to 2 kN) Ax= Ay= Bx= By=_ 2.40 Ay= By= Dx= 32% Bx= Cy= Dy=arrow_forwardEquilibrium Equations: Two-dimensional 2.28 Ra= Rc= 2.29 (change force to 600N) AC= AB= 2.33 CD= AC= DE= BC= Free Body Diagrams 2.34 Ax= Ay=_ Bx= By= 2.36 Ax= Ay= Bx= By= 2.37 (change middle force to 4000 lbs) Ay=_ Dx= Dy=_ 2.38 (change horizontal force to 2 kN) Ax= Ay= Bx= By=_ 2.40 Ay= By= Dx= 32% Bx= Cy= Dy=arrow_forwardYou can add the two forces together to get the total force at each joint.arrow_forward
- For 2.29 Find the forces in AC and CB (not AB) that are pushing on the joint C. Please also include an arrow that shows how the forces are pushing on joint C. Are they pushing on C or pulling on C. For 2.29 change force to 600N.arrow_forward1. Let n be an integer. Show that gcd (n², n² + n + 1) = 1. Note: You must justify every step of your proof using a result shown either in this course or in a previous one. Steps without a proper justification will not account for credit. 2. Express the following in base 10. Show all the necessary work to obtain your answer. (a) 12345 (b) 101012 (c) 11111 3. a) Convert the base 10 number 54321 to base 6. Show all the necessary work to obtain your answer. b) Convert the base 10 number 100 to base 2. Show all the necessary work to obtain your answer. 4. 6. For each of the following equations, find all integral solutions or show that it has none. Show all the necessary work to obtain your answer. (a) 3x+4y=10 (b) 44x-17y = 9 (c) 60x+9y= 31 (d) 16x + 24y = 44 5. What is the smallest nonzero value of X Y - where x and y are integers? Show all the necessary 136 31 work to obtain your answer. 6. Find the prime factorization of the following integers. Show all the necessary work to obtain your…arrow_forwardEquilibrium Equations: Two-dimensional 2.28 Ra= Rc= 2.29 (change force to 600N) AC= AB= 2.33 CD= AC= DE= BC= Free Body Diagrams 2.34 Ax= Ay=_ Bx= By= 2.36 Ax= Ay= Bx= By= 2.37 (change middle force to 4000 lbs) Ay=_ Dx= Dy=_ 2.38 (change horizontal force to 2 kN) Ax= Ay= Bx= By=_ 2.40 Ay= By= Dx= 32% Bx= Cy= Dy=arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Algebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
College AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell
Elementary Geometry For College Students, 7eGeometryISBN:9781337614085Author:Alexander, Daniel C.; Koeberlein, Geralyn M.Publisher:Cengage,
College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
Algebra and Trigonometry (MindTap Course List)
Algebra
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:Cengage Learning
College Algebra
Algebra
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:Cengage Learning
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
Elementary Geometry For College Students, 7e
Geometry
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Cengage,
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Propositional Logic, Propositional Variables & Compound Propositions; Author: Neso Academy;https://www.youtube.com/watch?v=Ib5njCwNMdk;License: Standard YouTube License, CC-BY
Propositional Logic - Discrete math; Author: Charles Edeki - Math Computer Science Programming;https://www.youtube.com/watch?v=rL_8y2v1Guw;License: Standard YouTube License, CC-BY
DM-12-Propositional Logic-Basics; Author: GATEBOOK VIDEO LECTURES;https://www.youtube.com/watch?v=pzUBrJLIESU;License: Standard Youtube License
Lecture 1 - Propositional Logic; Author: nptelhrd;https://www.youtube.com/watch?v=xlUFkMKSB3Y;License: Standard YouTube License, CC-BY
MFCS unit-1 || Part:1 || JNTU || Well formed formula || propositional calculus || truth tables; Author: Learn with Smily;https://www.youtube.com/watch?v=XV15Q4mCcHc;License: Standard YouTube License, CC-BY