Suppose that a box contains 7 cameras and that 5 of them are defective. A sample of 2 cameras is selected at random, without replacement. Define the random variable X as the number of defective cameras in the sample. The probability function for X is then x|f(x)
Suppose that a box contains 7 cameras and that 5 of them are defective. A sample of 2 cameras is selected at random, without replacement. Define the random variable X as the number of defective cameras in the sample. The probability function for X is then x|f(x)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
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Transcribed Image Text:Suppose that a box contains 7 cameras and that 5 of them are defective. A sample of 2 cameras is selected
at random, without replacement. Define the random variable X as the number of defective cameras in the
sample.
The probability function for X is then
x f(x)
01/21
1 10/21
2 10/21
What is the expected number of defective cameras in the sample?
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