probabilities

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 21P
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A company gives each worker a cash bonus every Friday, randomly giving a worker an amount with the probabilities: $10 0.9, $50 0.1. Over many weeks, what is a worker's expected weekly bonus?

1. (10 + 50)/2=$30

2. 10 x 0.9 + 50 x 0.1=$14

3. (10 x 0.9 + 50 x 0.1) / 2=$7

4. (10 + 50) / 10= $6

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