Table of Contents

## Are complements of independent events independent?

In conclusion, if two events are independent, then their complements are also independent.

**Are complements mutually independent?**

A complement is itself an event. An event and its complement are mutually exclusive and exhaustive. This means that in any given experiment, either the event or its complement will happen, but not both. By consequence, the sum of the probabilities of an event and its complement is always equal to 1.

### What Does It Mean If A and B are independent?

Two events A and B are said to be independent if the fact that one event has occurred does not affect the probability that the other event will occur. If whether or not one event occurs does affect the probability that the other event will occur, then the two events are said to be dependent.

**Are A and B independent justify?**

A and B are independent if and only if P(A∩B)=P(A)P(B). In general, one cannot say whether two events are independent or not without knowing the actual probability distribution (though there are some exceptions).

## What does the complement rule state?

The Complement Rule states that the sum of the probabilities of an event and its complement must equal 1, or for the event A, P(A) + P(A’) = 1.

**Can an event be independent of itself?**

The only events that are independent of themselves are those with probability either 0 or 1. That follows from the fact that a number is its own square if and only if it’s either 0 or 1.

### What if two events are independent?

Independent Events In probability theory, to say that two events are independent means that the occurrence of one does not affect the probability that the other will occur. In other words, if events A and B are independent, then the chance of A occurring does not affect the chance of B occurring and vice versa.

**How do you prove independent?**

Events A and B are independent if the equation P(A∩B) = P(A) · P(B) holds true. You can use the equation to check if events are independent; multiply the probabilities of the two events together to see if they equal the probability of them both happening together.

## How do you know if an event is independent or dependent?

**What is P A or B if A and B are independent?**

Formula for the probability of A and B (independent events): p(A and B) = p(A) * p(B). If the probability of one event doesn’t affect the other, you have an independent event. All you do is multiply the probability of one by the probability of another.