Final answer:
The expected net present value of building the auto plant is $42.3 million.
Step-by-step explanation:
The expected net present value of building the auto plant can be calculated by multiplying each possible net cash flow by their respective probabilities and discounting them to the present value using the opportunity cost of capital.
For the line to be successful (probability = 0.25):
Expected cash flow = ($40 million × 0.25) + ($4 million × (1-0.25)) = $10 million + $3 million = $13 million
Present value = $13 million / (1+0.04)¹ = $12.5 million
For the line to be unsuccessful (probability = 0.75):
Expected cash flow = ($40 million × 0.75) + ($4 million × (1-0.75)) = $30 million + $1 million = $31 million
Present value = $31 million / (1+0.04)¹ = $29.8 million
Adding up the present values gives: $12.5 million + $29.8 million = $42.3 million
Therefore, the expected net present value of building the plant is $42.3 million.