 Hi and welcome to our session where we discuss the following question. The question says, in a group of students, there are three boys and three girls. Four students are to be selected at random from the group. Find the probability that either three boys and one girl or three girls and one boy are selected. Let's now begin with the solution. Now there are three boys and three girls. We have to find the probability that either three boys and one girl or three girls and one boy are selected. Now three boys can be selected in C1 ways. When we selected, it's equal to 3C1 divided by 6C4. C1 into 3C3 divided by 6. This is equal to 1 into 3 divided by 15 plus 3 into 1 divided by 15. And this is equal to 6 divided by 15. This is equal to 2 divided by 5. So this completes the session. Bye and take care.