 Hi and welcome to the session. Let us discuss the following question. Question says, which of the following cannot be the probability of an event? A part is 2 upon 3, B minus 1.5, C 15 percent, D 0.7. We have to choose the correct answer. First of all let us understand that the probability of an event E is the number P E such that it is greater than equal to 0 and less than equal to 1. Now we will use this fact as our key idea to solve the given question. Let us now start with the solution. First of all let us consider 2 upon 3. Clearly we can see 2 upon 3 is greater than 0 and less than 1. So it satisfies this condition. This implies 2 upon 3 can be the probability of an event. Now let us consider 15 percent. Now 15 percent is equal to 0.05 and we know 0.05 is greater than 0 and less than 1. So it satisfies this condition or we can say 15 percent is less than 1 and greater than 0. So 15 percent can be the probability of an event. Now let us consider D part that is 0.7. Clearly we can see 0.7 is greater than 0 and less than 1. So it satisfies this condition given in the key idea so it can be probability of an event. Now let us consider B part. We are given minus 1.5. Now clearly we can see this value is less than 0 and we know probability of an event is greater than equal to 0 and less than equal to 1. So this value does not satisfies this condition. So we get minus 1.5 cannot be the probability of an event. So correct answer is B. This is our required answer. This completes the session. Hope you understood the solution. Take care and have a nice day.