Assume a class has 28 members. a. In how many ways can a president, a vice president, and a secretary be selected? b. How many committees of 5 people can be chosen?
Assume a class has 28 members. a. In how many ways can a president, a vice president, and a secretary be selected? b. How many committees of 5 people can be chosen?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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How it’s 19,656
How to calculated and get that answers??

Transcribed Image Text:(Chapter 9)
K
View an example | All parts showing
Assume a class has 28 members.
a. In how many ways can a president, a vice president, and a secretary be selected?
b. How many committees of 5 people can be chosen?
nPr=
(n-r)!
In this case, n = 28 and r = 3.
Pr=28P3
=
28!
(28 - 3)!
Question 11,9.4.A-9
29!
25!
= 19,656
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