

Ex 1.4
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 You are here
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
Last updated at Jan. 27, 2020 by Teachoo
Ex 1.4, 5 Find the intersection of each pair of sets: (i) X = {1, 3, 5} , Y = {1, 2, 3} X ∩ Y = {1,3,5} ∩ {1,2,3} = {1, 3} ∩ Intersection – Common of two sets Ex 1.4, 5 Find the intersection of each pair of sets: (ii) A = {a, e, i, o, u} B = {a, b, c} A ∩ B = {a, e, i, o, u} ∩ {a, b, c} = {a} ∩ Intersection – Common of two sets Ex 1.4, 5 Find the intersection of each of the following pairs of sets: (iii) A = {x: x is a natural number and multiple of 3} B = {x: x is a natural number less than 6} Natural number = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,… A = {x: x is a natural number and multiple of 3} Multiple of 3 = 3, 6 ,9,12,15… A = {3, 6, 9 …} ∩ Intersection – Common of two sets B = {x: x is a natural number less than 6} = {1, 2, 3, 4, 5} A ∩ B = {3, 6, 9 …} ∩ {1, 2, 3, 4, 5} = {3} Ex 1.4, 5 Find the intersection of each of the following pairs of sets: (iv) A = {x: x is a natural number and 1 < x ≤ 6} B = {x: x is a natural number and 6 < x< 10} Natural number = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,… A = {x: x is a natural number and 1 < x ≤ 6} = {2, 3, 4, 5, 6} B = {x: x is a natural number and 6 < x< 10} = {7, 8, 9} A ∩ B = {2, 3, 4, 5, 6} ∩ {7, 8, 9} = { } = ∅ Ex 1.4, 5 Find the intersection of each pair of sets: (v) A = {1, 2, 3}, B = ∅ Given A = {1, 2, 3} and B = ∅ = {} A ∩ B = {1, 2, 3} ∩ {} = ∅ ∴ There is no common item between both sets ∩ Intersection – Common of two sets