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  • Probability
    • P( event A or B or both) = P(A U B)
    • P(Both event A and B) = P(A n B)
    • P(not event A) = P(A')
    • Venn diagrams
    • Addition Rule P(A U B) = P(A) + P(B) -P(A n B)
      • Given in Formula Book
        • Addition Rule P(A n B) = P(A) + P(B) -P(A U B)
    • Addition Rule P(A n B) = P(A) + P(B) -P(A U B)
    • Conditional Probability P(A | B) = probability A happens given that B happens
      • P(A|B) =    P(A n B) / P(B)
    • Multiplication Rule          P(A n B) = P(A|B) x P(B)
      • given in fomrula book
    • mutually exclusive: if they have no outcomes in common so P(A n B) = 0
      • so P(A U B) = P(A) + P(B)
    • independant events: if the events do not affect each other so P(A|B) = P(A)
      • P(A n B) = P(A) x (B)


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