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If there is a \(20\%\) chance of rain every day for the next \(7\) days, what is the probability that it will rain exact

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by VJesus12 » Fri Jul 24, 2020 7:24 am

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If there is a \(20\%\) chance of rain every day for the next \(7\) days, what is the probability that it will rain exactly \(2\) days out of the next \(7?\)

A. \(\dfrac{21}{10^7}\)

B. \(\dfrac{2^7}{10^7}\)

C. \(\dfrac{21^7}{10^7}\)

D. \(\dfrac{(21)(2^{17})}{10^7}\)

E. \(\dfrac{(42)(2^{17})}{10^7}\)

[spoiler]OA=D[/spoiler]

Source: Veritas Prep
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