Last updated at Jan. 27, 2020 by Teachoo

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Ex 1.4, 12 State whether each of the following statement is true or false. Justify your answer. (i) {2, 3, 4, 5} and {3, 6} are disjoint sets. {2, 3, 4, 5} ∩ {3, 6} = {3} ≠ ∅ Since, there is a common element in both set. The given sets are not disjoint. So, the given statement is False Two sets are disjoint if they have no common element ∩ Intersection – Common of two sets If A ∩ B = ∅, then sets are disjoint Ex 1.4, 12 State whether each of the following statement is true or false. Justify your answer. (ii) {a, e, i, o, u } and {a, b, c, d} are disjoint sets. {a, e, i, o, u } ∩ {a, b, c, d} = {a} ≠ ∅ Since, there is a common element in both set. The given sets are not disjoint. So, the given statement is False Two sets are disjoint if they have no common element ∩ Intersection – Common of two sets If A ∩ B = ∅, then sets are disjoint Ex 1.4, 12 State whether each of the following statement is true or false. Justify your answer. (iii) {2, 6, 10, 14} and {3, 7, 11, 15} are disjoint sets. {2, 6, 10, 14} ∩ {3, 7, 11, 15} = ∅ Since, there is no common element in both set. Hence the pair of sets are disjoint So, the given statement is True Two sets are disjoint if they have no common element ∩ Intersection – Common of two sets If A ∩ B = ∅, then sets are disjoint Ex 1.4, 12 State whether each of the following statement is true or false. Justify your answer. (iv) {2, 6, 10} and {3, 7, 11} are disjoint sets. {2, 6, 10} ∩ {3, 7, 11} = ∅ Since, there is no common element in both set. Hence the pair of sets are disjoint So, the given statement is True Two sets are disjoint if they have no common element ∩ Intersection – Common of two sets If A ∩ B = ∅, then sets are disjoint

Ex 1.4

Ex 1.4, 1 (i)

Ex 1.4, 1 (ii)

Ex 1.4, 1 (iii)

Ex 1.4, 1 (iv) Important

Ex 1.4, 1 (v)

Ex 1.4, 2

Ex 1.4, 3 Important

Ex 1.4, 4 Important

Ex 1.4, 5 Important

Ex 1.4, 6

Ex 1.4, 7

Ex 1.4, 8 (i)

Ex 1.4, 8 (ii) Important

Ex 1.4, 8 (iii)

Ex 1.4, 9 Important Deleted for CBSE Board 2022 Exams

Ex 1.4, 10 (i) Deleted for CBSE Board 2022 Exams

Ex 1.4,10 (ii) Deleted for CBSE Board 2022 Exams

Ex 1.4, 10 (iii)

Ex 1.4, 11 Deleted for CBSE Board 2022 Exams

Ex 1.4, 12 Important You are here

Chapter 1 Class 11 Sets (Term 1)

Serial order wise

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.