Final answer:
The expected value for Decision d₁ cannot be calculated without the probabilities for each outcome.
Step-by-step explanation:
The expected value for Decision d₁ can be calculated by multiplying each possible outcome by the probability of that outcome and then summing them up. In this case, we don't have the probabilities for each outcome, so we cannot calculate the expected value. Therefore, we cannot determine whether the expected value for Decision d₁ is $2,400, $1,400, $1,200, or $1,800.