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The Number of Electrical Outages in a City Varies from Day

Question 68

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The number of electrical outages in a city varies from day to day.Assume that the number of electrical outages (x) in the city has the following probability distribution.
xf(x) 00.8010.1520.0430.01\begin{array} { c c } x & f ( x ) \\\hline 0 & 0.80 \\1 & 0.15 \\2 & 0.04 \\3 & 0.01\end{array}
The mean and the standard deviation for the number of electrical outages (respectively) are


A) 2.6 and 5.77
B) 0.26 and 0.577
C) 3 and 0.01
D) 0 and 0.8

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