There are 10 details and 4 of them are standard. Three details are randomly selected. Find the probability distribution of the random variable X, where X is a number of the standard details among 3 selected details. Find the mean and 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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There are 10 details and 4 of them are standard. Three details are randomly selected. Find the
probability distribution of the random variable X, where X is a number of the standard
details among 3 selected details. Find the mean and standard deviation of X.

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