# What is the probability of getting three heads or three tails with three coin flips?

Oct 27, 2015

P(3H or 3T) $= \frac{1}{4}$

#### Explanation:

Assuming a FAIR coin:

P(3H) $= {\left(\frac{1}{2}\right)}^{3} = \frac{1}{8}$

P(3T) $= {\left(\frac{1}{2}\right)}^{3} = \frac{1}{8}$

P(3H or 3T) $= \frac{1}{8} + \frac{1}{8} = \frac{1}{4}$

hope that helped