 Hello and welcome to the session. I am Deepika here. Let's discuss a question which says if A and B are two events such that A is a subset of B and probability of B is not equal to 0 then which of the following is correct? Probability of A upon B is equal to probability of B upon probability of A Probability of A upon B is less than probability of A Probability of A upon B is greater than equal to probability of A and none of these Now we know that the conditional probability of an event E given the occurrence of the event F is given by probability of E upon F is equal to probability of E intersection F Over probability of F Provided probability of F is not equal to 0 So this is a key idea behind this question We will take the help of this key idea to solve the above question So let's start the solution Now we are given A and B are two events such that A is a subset of B and probability of B is not equal to 0 And we have to choose the correct option from A, B, C and D Now according to our key idea we have probability of A upon B is equal to probability of A intersection B over probability of B Provided probability of B is not equal to 0 Let us give this as number one since A is a subset of B. This implies A intersection B is equal to A therefore probability of A intersection B is equal to probability of A Also we have Probability of B is not equal to 0 So from one we have probability of A upon B is equal to probability of A upon probability of B Since probability of B is less than equal to 1 That is probability is always less than or equal to 1. So this implies probability of A upon B is greater than equal to probability of A But this is our option C Hence C is the correct answer. So this completes our session. I hope the solution is clear to you. Bye and have a nice day