Answer:
$20
Step-by-step explanation:
I might be wrong but in my work I did this 4,8,12 + 2 = $20 because you have to multiply and add to get the answer and I got it would be $20. Correct me if wrong.
The one is the same everywhere so we ignore it.

Choice B
Answer:
Answer 3, 
Step-by-step explanation:
If every element of the sum is multiplied by 8, we can just pull the 8 in front of the sum symbol.
Answer:
Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.
Step-by-step explanation:
Given the probability distribution table below:

(a)Mean
Expected Value, 
=(0*0.8)+(1*0.15)+(2*0.04)+(3*0.01)
=0+0.15+0.08+0.03
Mean=0.26
(b)Standard Deviation

Standard Deviation 

Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.