Question:

Which formula represents the probability of the complement of event ?

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a. 1 + P(A)

b. 1 - P(A)

c. P(A)

d. P(A) -1

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  1. b.

    Either the event happens or it doesn't, and the total probability must be one. So if p is the probability of the event, 1-p is the probability it doesn't happen.

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