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P(A union B)Formula

P(A∪B)Formula

"Or" is represented by the symbol "∪" (union). P(A∪B) denotes the probability of an event A or B occurring. We must count the sample points that are present in both A and B to find P(A∪B). Is P(A∪B) equal to P(A) + P(B)? No, because the sample points in A and B are counted twice when tallying the sample points from A and B. To get P(A∪B), we need to remove P(A∩B) from the above amount.For more Maths formulas click on the main page.

P(A?B) Formula1

  1. P(A∪B) = P(A) + P(B) - P(A∩B)
  2. the P(A∪B) formula is:
  3. P(A∪B) = P(A) + P(B) - P(A∩B)
  4. This is also known as the probability addition theorem.
  5. When events A and B are mutually exclusive than in that case, P(A∩B) = 0.
  6. The P(A∪B) formula when A & B are mutually exclusive is,
  7. P(A∪B) = P(A) + P(B)

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