# Why can a disjoint event not be independent?

##### 1 Answer

Jan 3, 2018

That is because you know one event will happen when the other doesn't, which means they are not independent- outcome of one DOES influence or affect other outcomes.

#### Explanation:

Two events (let's say A and B) are disjoint (also called mutually exclusive) if they have no outcomes in common and never occur simultaneously.

Therefore, if event A happens, you know for a fact that event B will not happen.

Hope this helps!