Probability

Probability

1. Compliment property

   • P(A') = 1 - P(A)

2. Simple events

   • tossing a coin
   • rolling a dice
   • Sample space = universal set (U) sum of probabilities = 1
   • P(A) = n(A)/n(U)

3. Mutually exclusive events

   • P(AuB) = P(A) + P(B)
   • disjoint sets

4. Non-mutually exclusive events

   • P(AuB) = P(A) + P(B) - P(AnB)
   • have an intersection

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