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

Question

Mathematics

Jasiah

27 February, 16:23

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

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Answers (1)

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Madilyn Whitney · Answer 1

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