Answer: [tex]P(B/A)=\dfrac{P(B\cap A)}{P(A)}.[/tex]
Step-by-step explanation: We know what is conditional probability. It is defined as follows -
Given any two events A and B, the conditional probability of B given A is defined as the probability of happening of event B with the condition that the event A has already occured.
Mathematically, it is written as P(B/A) and its formula is given by the quotient of the probability of the joint of events B and A to the probability of event A.
i.e,
[tex]P(B/A)=\dfrac{P(B\cap A)}{P(A)}.[/tex]
This is the required formula.
