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

Question

Mathematics

Trenton Petty

13 April, 02:12

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

+1

Answers (1)

Know the Answer?

Conan · 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