 Hello and welcome to the session. Let us discuss the following question. It says if 2 by 11 is the probability of an event, what is the probability of the event not A? So let us first understand the key idea behind this question. If the probability of an event A is P, then the probability of the event not A or we can say probability of A bar is equal to 1 minus P. This will be the key idea. Let us now move on to the solution. We are given that the probability of an event A is 2 by 11. So the probability of the event not A is 1 minus 2 by 11, which is equal to 9 by 11. Hence the probability of not A is 9 by 11. And this completes the question. Might we now take care and have a good day.