I need all the answers for the chapter 9 mid check point on think central pls help now asap

Expected revenue = $400

Step-by-step explanation:

Expected revenue is given by the formula;

Expected revenue = Sum of x * p(x)

x = 200

x = 600

p(x) = 1/2

p(x) = 1/2

Substituting, we have;

Expected revenue = 200*1/2 + 600*1/2

                               = 100 + 300

                                = $400

Therefore, expected revenue = $400