Concept explainers
(a)
To calculate the number of ways that the program can choose who answers these three questions.
(a)
Answer to Problem 8.42E
Explanation of Solution
Use the multiplication counting principle and that there are
(b)
To calculate the number of ways in which three different students are chosen to answer these three questions.
(b)
Answer to Problem 8.42E
Explanation of Solution
Since order is important we need to use a permutation:
(c)
To calculate the probability that the program selects three different students in the class for the first three questions.
(c)
Answer to Problem 8.42E
Explanation of Solution
The probability is then:
Chapter 8 Solutions
Statistics Through Applications
Additional Math Textbook Solutions
Statistics: The Art and Science of Learning from Data (4th Edition)
Essentials of Statistics (6th Edition)
Elementary Statistics
STATS:DATA+MODELS-W/DVD
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