What is the probability of getting at least one tail if a fair coin is flipped three times?

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Nov 1, 2015

$\frac{7}{8}$

Explanation:

Probability of NOT getting a tail in 3 coin toss is ${\left(\frac{1}{2}\right)}^{3} = \frac{1}{8}$.

Probability of getting at least 1 tail in 3 coin toss is $1 - \frac{1}{8} = \frac{7}{8}$.

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