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10-10-2016
Mathematics

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An unfair coin with .4 probability of tails is flipped 7 times what is the probability of obtaining exactly 5 heads

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10-10-2016

P(heads) = 1 - 0.4 = 0.6[tex]P(5\ heads)=7C5\times0.6^{5}\times0.4^{2}=0.2613[/tex]
The answer is 0.26 to 2 d.p.

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