expected value

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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An insurance salesperson can sell policies to 15% of the people she contacts. Suppose that she contacts 120 people during a 2 – week period, what is the expected value for the number of policies she tells?

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