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Probability Calculator — AND, OR, Conditional & Complement

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Calculated result

P(A and B) = 20%

P(A or B) = 70%

P(neither) = 30%

P(exactly one) = 50%

Show the working
  1. 1. Assuming independence: P(A ∩ B) = 0.5 × 0.4 = 0.2.
  2. 2. P(A ∪ B) = P(A) + P(B) − P(A ∩ B) = 0.7.

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