Use the sum rule to determine the probability of either event X or event Y occurring if they cannot

occur simultaneously. (In the equations below, Px means probability of event X; Py means probability
of event Y.)



a. = Px + Py
b. = PxPy
c. = (Px)2 + (Py)2
d. = (Px + Py)2
e. = Px
2Py
2


A

Biology & Microbiology

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