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Mutually exclusive
P(A1 ∩ A2) = 0
Collectively Exhaustive
P(A1 U A2) = 1
Risk-neutral
makes decisions based on expected gain (positive expected return on investment)
Risk-averse (avoidant)
wants expected gain and a low probability of loss
Risk-loving
may take a risk even if there is expected loss, as long as there is a probability of gain
two non-empty events A and B are independent
P(A|B) = P(A) or P(A∩B)= P(A)P(B