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09-10-2016
Mathematics

Answered

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

Verified Answer :

09-10-2016

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

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