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Determine Whether Events Are Independent
Grade Level
Praxis Core
5165.259 Determine Whether Events Are Independent
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A probability summary states P(A)=3/10, P(B)=1/2, and P(A or B)=13/20. Which conclusion follows?
A
A and B are independent because P(A and B)=3/20 equals P(A)P(B)=3/20.
B
A and B are not independent because P(A or B) must equal P(A)P(B), but 13/20 is not 3/20.
C
There is not enough information because P(A and B) was not given directly.
D
A and B are mutually exclusive because P(A or B)=13/20.
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