The total profit of a firm is given by
Profit = Total Revenue - Total Cost
Suppose that Total Revenue = 120Q and Total Cost = 20 + 50Q where Q, the quantity sold, is a (approximately) normal random variable with expected value 30 and variance 5. That is Q is N(30,5)
- What is the expected value of total profit?
- What is the variance of total profit?
- What is the standard deviation of total profit?