Which of the following is a true statement about mutually exclusive events?
they must happen one right after the other.
they cannot influence each other.
they cannot happen at all.
they cannot happen at the same time.

They cannot happen at the same time.

Explanation:

Mutually exclusive events are those in which the existence of one situation automatically excludes the existence of another. For this reason, we can say that mutually exclusive events cannot happen at the same time.

As an example, we can mention that you can quickly notice that a 50% chance of a coin falling in the face and a 50% chance of falling in the crown, because there is a chance between two possible situations. You can also easily notice that it is impossible to get both results at once, as the coin will not fall on both sides simultaneously. Therefore the probability of obtaining two results at the same time is zero and such an event is called a mutually exclusive event.