 Hi and welcome to the session. Let us discuss the following question. Question says, if probability of E is equal to 0.05, what is the probability of not E? First of all, let us understand that for any event E, probability of E plus probability of not E is equal to 1. Here, E bar stands for not E. Now, here E and E bar are called complementary events. Now, we will use this fact as our key idea to solve the given question. Let us now start with the solution. Now, we are given in the question that probability of E is equal to 0.05. We have to find probability of not E. Now, from key idea, we know probability of E plus probability of not E is equal to 1. Now, substituting corresponding value of probability of E in this expression, we get 0.05 plus probability of not E is equal to 1. Now, subtracting 0.05 from both the sides of this expression, we get probability of not E is equal to 1 minus 0.05. Now, this is further equal to 0.95. So, we get probability of not E is equal to 0.95. So, this is our required answer. This completes the session. Hope you understood the solution. Take care and have a nice day.