cinthiagonzales cinthiagonzales

15-02-2017
Mathematics

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an experiment consists of flipping a fair coin 4 times. What is the probability of obtaining at least one head?

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LammettHash LammettHash

16-02-2017

[tex]\mathbb P(X\ge1)=1-\mathbb P(X=0)[/tex]

The probability of getting 0 heads in 4 tosses (or equivalently, 4 tails) is [tex]\dfrac1{2^4}=\dfrac1{16}[/tex].

So the desired probability is

[tex]1-\dfrac1{16}=\dfrac{15}{16}[/tex]

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