# A coin is tossed 4 times, what is the probability of NOT getting 2 heads?

##### 1 Answer

Feb 21, 2016

Use the **complement method** ...

#### Explanation:

**P(not getting 2 heads) = 1 - P(getting two heads)**

Assuming a **FAIR coin** and using the **BINOMIAL distribution** ...

**P(getting two heads)**

Finally, ...

**P(not getting 2 heads)**

hope that helped