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

$\frac{7}{8}$
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 $1 - \frac{1}{8} = \frac{7}{8}$.