Answer:

Step-by-step explanation:
We are given the following in the question:
x: −4 −3 −2 −1 0
P(X=x): 0.2 0.3 0.1 0.2 0.2
We have to evaluate

Since it is a discrete probability distribution as

We can evaluate the probability as:

Thus, 0.4 is the require probability.
108
I'm not positive but i belive this is correct
First, you divide the fraction, and then you multiply it by 100.
So you get:



So, 5/16 is 31.25%
Hope this Helps! :)
Isolate the variable by dividing each side by factors that don't contain the variable. p=q/2r