The probability of an event A or B (Pr(A or B)) to occur equals

The probability of an event A or B (Pr(A or B)) to occur equals

The probability of an event A or B (Pr(A or B)) to occur equals


A) Pr(A) x Pr(B)
B) Pr(A) + Pr(B) if A and B are mutually exclusive.
C) Pr(A)/Pr(B)
D) Pr(A) + Pr(B) even if A and B are not mutually exclusive.

Answer: B