The total time, measured in units of 100 hours, that a teenager runs her stereo set over
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The total time, measured in units of 100 hours, that a teenager runs her stereo set over a period of one year is a continuous random variable A that has the density function Use Theorem 4.6 to evaluate the mean of the random variable Y = 60X~ + 39X, where Y is equal to the number of kilowatt hours expended annually.
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Related Book For 
Probability & Statistics For Engineers & Scientists
ISBN: 9780130415295
7th Edition
Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying
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