
Martin S. answered 04/10/20
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Patient, Relaxed PhD Molecular Biologist for Science and Math Tutoring
These are three independent events that all must occur, so take the individual probabilities and multiply them to get the overall probability.
The probability of getting heads or tails on any given flip is equal to 1/2, so
1/2 x 1/2 x 1/2 = 1/8.
Hope this helps