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.

x f(x)
0 0.80
1 0.15
2 0.04
3 0.01

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

b) mean = 0.26, standard deviation = 0.577

Step-by-step explanation:

mean is given be formula:

Standard deviation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

1 and 0

step-by-step explanation: