A box has 10 pencils and 5 pens.  Select randomly 3 items from the box.  Let X be the number of pencils in 3 items selected Find VX

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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A box has 10 pencils and 5 pens.

 Select randomly 3 items from the box. 

Let X be the number of pencils in 3 items selected

Find VX

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