indiaseel1744 indiaseel1744

14-09-2017
Mathematics

contestada

If a fair coin is flipped eight times, what is the probability that heads comes up three or more times?

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gmath95 gmath95

16-09-2017

since the probability of a head occuring when tossed a time is 1/2
x=head occuring 3 or more times
Pr(x>=3)=1-Pr(x<3)=1-(0.5)(0.5)^2
Pr(x>=3)=0.875

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