Examlex
Which of the following portfolios have the least risk?
Marginal Probability
The probability of an event occurring, disregarding all other variables or outcomes in a probability distribution.
E(XY)
The expected value of the product of two random variables X and Y, indicating their joint mean over all pairs of outcomes.
Marginal Probability
The probability of an event occurring, regardless of the outcomes of other variables; it is calculated by summing the probabilities of the event across all values of the other variables.
E(X + Y)
The expected value of the sum of two random variables, equal to the sum of their individual expected values.
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