Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected. Question 18      What is the standard deviation of the number of minorities? Your answer must have four digits after the period (e.g., 5.1010).

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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Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.

Question 18 

 
 
What is the standard deviation of the number of minorities? Your answer must have four digits after the period (e.g., 5.1010). 
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