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For any event, P(A) + P(not A) = ​

User Billy Chan
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1 Answer

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16 votes

Answer: 1

Step-by-step explanation:

P(A) represents the probability of event A

P(not A) is the probability that event A doesn't happen

We only have two choices: Either A happens or it doesn't

So that means P(A) + P(not A) = 1

The "1" represents a 100% chance, aka certainty.

User Daniel Patru
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