Stats 2 Chapter 2 - Probability Flashcards by Venisha Luo

Q

If evens A and B are independent (laws)

A

P(AnB) = P(A) x P(B)
P(A|B) = P(A)

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Q

If events A and B are mutually exclusive

A

P(AnB) = 0
P(AUB) = P(A) + P(B)

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Q

In general

A

P(A|B) = P(AnB)/P(B)
P(AUB) = P(A) + P(B) - P(AnB)

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