Concept explainers
(a) There are 10 chairs in a row and 8 people to be seated. In how many ways can this be done?
(b) There are 10 questions on a test and you are to do 8 of them. In how many ways can you choose them?
(c) In part (a) what is the probability that the first two chairs in the row are vacant?
(d) In part (b), what is the probability that you omit the first two problems in the test?
(e) Explain why the answer to parts (a) and (b) are different, but the answers to
(c) and (d) are the same.
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
Mathematical Methods in the Physical Sciences
Additional Math Textbook Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences (13th Edition)
Finite Mathematics & Its Applications (12th Edition)
A Survey of Mathematics with Applications (10th Edition) - Standalone book
Using and Understanding Mathematics: A Quantitative Reasoning Approach (6th Edition)
The Heart of Mathematics: An Invitation to Effective Thinking
Introductory Mathematics for Engineering Applications
- College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage LearningAlgebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL