Maths S1 Formuals
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What is the addition rule for probability?
P(A or B) = P(A) + P(B) - P(A and B)
What is the formula for conditional probability?
P(A|B) = P(A. and B)/P(B)
What is the multiplication rule for probability?
P(A and B) = P(A|B) x P(B)
How can you calculate if A and B are independent?
- P(A|B) = P(A)
- P(A and B) = P(A) x P(B)
How do you know if A and B are mutually exclusive?
P(A and B) = 0
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