Past Question by GRE Question a Day



Directions: Multiple Selection - select all that apply.

Events A and B, not necessarily independent, have probabilities of 1/2 and 2/3 of occurring, respectively. Which of the following could not be the probability that either A or B occurs, but not both?


A

1/6

B

1/4

C

1/3

D

1/2

E

1



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