The Number of Electrical Outages in a City Varies from Day

Multiple Choice

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. ​ ​
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.