Verified Answer :

LammettHash

\(\mathbb P(X\ge1)=1-\mathbb P(X=0)\)

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

So the desired probability is

\(1-\dfrac1{16}=\dfrac{15}{16}\)

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