A part-time employee works for 1, 2 or 3 hours per day, each with a probability of 1/3. The number of hours worked on each day is also independent of the hours on any other day. Suppose the hourly rate is $10. Let his/her total salary for a two-day period be ?. Find the expected value and variance of ?.

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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A part-time employee works for 1, 2 or 3 hours per day, each with a probability of 1/3. The number of hours worked on each day is also independent of the hours on any other day. Suppose the hourly rate is $10. Let his/her total salary for a two-day period be ?. Find the expected value and variance of ?.

 
 
 
 
 
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