ANSWERS: 1
  • What are the events A-D? P(A or B) = P(A) + P(B) - P(A & B) If the events A and B are mutually exclusive, then P(A & B) = 0 so P(A or B) would be 11/12 Otherwise, if the events A and B are independent, then P(A and B) = P(A) P(B) by definition of independent. So P(A or B) would be 7/12 But it depends on what on earth C and D are. Probably.

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