Conditional probability calculator is an online statistical tool to calculate the probability of two events when if they are dependent. It is defined as the probability of an event happen when another event is already happened at that time.Let us discuss the given definition in detail. Consider the event A is occurring given that the event B is already occurred. So the probability is denoted as P(A/B) and read it as 'probability of A given B'. If the events are independent of each other, P(A/B) become P(A). If the events are dependent, the equation of conditional probability will be, 


Conditional Probability

Where P(A/B) is the conditional probability
          P(A) is the probability of event A
          P(B) is the probability of event B

The following steps will help you to find out the conditional probability of an event.

Step1: Find out the P(A$\cap$ B) and P(A) or P(B) from the question.

Step2: Calculate the conditional probability using the given equations.

P(A/B)=$\frac{P(A\cap B)}{P(B)}$

P(B/A)=
$\frac{P(A\cap B)}{P(A)}$