4. Jane decided to sell her house. A random variable X models the number of passengers in cars arriving at the auction for Jane's house. X takes values of 0 or 1 or 2 or 3. The probabilities it takes the values 1, 2, or 3 are 0.3, 0.2, and 0.1 respectively. (a) Find the mean value of X. (b) Find the standard deviation of X.

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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4. Jane decided to sell her house. A random variable X models the
number of passengers in cars arriving at the auction for Jane's house.
X takes values of 0 or 1 or 2 or 3. The probabilities it takes the values
1, 2, or 3 are 0.3, 0.2, and 0.1 respectively.
(a) Find the mean value of X.
(b) Find the standard deviation of X.
Transcribed Image Text:4. Jane decided to sell her house. A random variable X models the number of passengers in cars arriving at the auction for Jane's house. X takes values of 0 or 1 or 2 or 3. The probabilities it takes the values 1, 2, or 3 are 0.3, 0.2, and 0.1 respectively. (a) Find the mean value of X. (b) Find the standard deviation of X.
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It is given that the probability for the values 1, 2, 3, are 0.3, 0.2 and 0.1 respectively.

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