3. Five people, including you and a friend, line up in a random order. Let X count the number of people in the line standing in between you and your friend. (a) Find the pmf px(x) by constructing a neat, organized table of values. Express your answers as fractions in lowest terms. (Note that a waiting line is ordered. Permutations are needed here.)
3. Five people, including you and a friend, line up in a random order. Let X count the number of people in the line standing in between you and your friend. (a) Find the pmf px(x) by constructing a neat, organized table of values. Express your answers as fractions in lowest terms. (Note that a waiting line is ordered. Permutations are needed here.)
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 84E
Related questions
Question
![3. Five people, including you and a friend, line up in a random order. Let X count the
number of people in the line standing in between you and your friend.
(a) Find the pmf px(x) by constructing a neat, organized table of values. Express
your answers as fractions in lowest terms. (Note that a waiting line is ordered.
Permutations are needed here.)
(b) Find Var (X). Express your answer as a decimal.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffc2a3207-1546-4f7c-866f-8a9e0d862ab8%2Fcde623e3-92df-4408-a60e-17edf654e780%2F9i2nmn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3. Five people, including you and a friend, line up in a random order. Let X count the
number of people in the line standing in between you and your friend.
(a) Find the pmf px(x) by constructing a neat, organized table of values. Express
your answers as fractions in lowest terms. (Note that a waiting line is ordered.
Permutations are needed here.)
(b) Find Var (X). Express your answer as a decimal.
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