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I want to create an algorithm to calculate the OR of n independent events, anyone can help me?

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Can you compute the probability that none of them occurs ? – Joel Cohen Nov 9 '12 at 15:01
Hint: Use DeMorgan's laws and resolutely refuse to use FOIL. See this answer and the comments following it. – Dilip Sarwate Nov 9 '12 at 15:15

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