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Syamantak

  • 2 years ago

probability of raining on a day is 0.2 What is the probability of raining on exactly 2 days in a week ?

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  1. RadEn
    • 2 years ago
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    to chose 2 days in 7 days, use the 7C2 = 7!/(7-2)2! = 7!/5!2! = 21 ways so, the probability of raining on exactly 2 days in a week is 21 * 0.2 * 0.2 = ...

  2. Syamantak
    • 2 years ago
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    Sorry but it is a wrong answer @RadEn

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