Independent & mutually exclusive

• Mutually exclusive - events which have no common outcome.
• Independent events - events where the occurrence of one event does not affect another.
• Mutually exclusive checks


  • P(A n B) = 0
  • P(A U B) = P(A) + P(B)
• Independence check


  • P(A n B) = P(A) x P(B)
• Exam technique for independent and mutually exclusive


  • make a clear statement and compare values using rules