/sci/ - Science & Math

Anonymous Sat Apr 28 11:28:39 2018 No.9704019 [View]
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I just realised that I don't know the answer for the first given possibility.

Assume that each of the hours are independent. At the start of each of the 5 hours, god rolls a 1d5 and lets it pour from the heavens if he gets a 5. What is the probability that it rains at least once?

When you OR independent events, you just add them, right? But that gives 5*0.2= a 100% chance of rain, which intuitively seems wrong. What's the answer?

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/sci/ - Science & Math

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