## What is the formula of P AUB?

P(AUB) = P(ABc U AcB U AB ). P(AUB) = P(ABc) + P(AcB) + P(AB). P(A) + P(B) = P(ABc)+ P(AcB) +2×P(AB).

## How do you find b given a?

This probability is written P(B|A), notation for the probability of B given A. In the case where events A and B are independent (where event A has no effect on the probability of event B), the conditional probability of event B given event A is simply the probability of event B, that is P(B). P(A and B) = P(A)P(B|A).

## What does P A and B mean in statistics?

Definitions and Notation

The probability that Event A occurs, given that Event B has occurred, is called a conditional probability. The probability that Event A will not occur is denoted by P(A’). The probability that Events A and B both occur is the probability of the intersection of A and B.

## What is the probability that both A and B occur?

If A and B are independent, then the probability that events A and B both occur is: p(A and B) = p(A) x p(B). In other words, the probability of A and B both occurring is the product of the probability of A and the probability of B.