 Hello and welcome to the session. In this session we will discuss the following question and the question says, classify the following sets as disjoint and overlapping sets. First part is, A is equal to days of a week, B is equal to days starting with letter S. Second part is, A is equal to the set containing the words goat, monkey, dog. B is equal to the set containing the words sparrow, peacock, duck. Third part is, X is equal to first five multiples of two. Y is equal to first five multiples of five. Fourth part is, P is equal to the set containing the elements 1, 3, 5, 7. Q is equal to the set containing the elements 2, 4, 6, 8. And the fifth part is, C is equal to set of letters of the word pink, D is equal to set of letters of the word blue. Before we solve this question we shall review what are disjoint and overlapping sets. Let us first recall what are disjoint sets. Disjoint sets are two sets which have no elements in common between them. Now we shall recall what are overlapping sets. Disjoint sets are two sets which have at least one element in common between them. So this is the key idea for this question and using this key idea we shall solve the question. Let us start the solution now. First part is, we are given set A is equal to days of a week and set B is equal to days starting with letter S. We shall first list down the elements of the set A. Since A is the set containing days of the week, so set A in roster form is equal to the set containing the elements Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Also the days starting with the letter S are Saturday and Sunday. So B is equal to the set containing the elements Saturday and Sunday. We can see that the two sets A and B have two common elements between them that is Sunday and Saturday. A and B have two elements in common therefore sets A and B are overlapping sets. So this is our answer for the first part. Now the second part is A is equal to the set containing the elements goat, monkey and dog. B is equal to the set containing the elements sparrow, peacock and duck. Now the sets A and B have no elements in common. So we can say that as there are no elements in common therefore sets A and B disjoint sets. This is our answer for the second part. Now the third part is X is equal to first five multiples of two and Y is equal to first five multiples of five. We know that first five multiples of two are two, four, six, eight, ten. So the set X in roster form is equal to the set containing the elements two, four, six, eight and ten. Also the first five multiples of five are five, ten, fifteen, twenty and twenty-five. So the set Y in roster form is equal to the set containing the elements five, ten, fifteen, twenty, twenty-five. Now ten is the common element between the two sets X and Y. So we can say that as ten is common in both the sets therefore X and Y are overlapping sets. Fourth part is P is equal to the set containing the elements one, three, five, seven and Q is equal to the set containing the elements two, four, six, eight. There are no elements in common therefore P and Q are disjoint sets. The fifth part is C is equal to set of letters of the word pink. D is equal to set of letters of the word blue. So the set C in roster form is equal to the set containing the elements P, I, N, K. Also the set D in roster form is equal to the set containing the elements B, L, U, E. There are no elements in common therefore C and D are disjoint sets. With this we end our session. Hope you enjoyed the session.