Class VIII - Operations on sets

Let C={2, 5, 7, 10} and B={2, 4, 6, 8}. Find C U B.

• {2,4,6,8,10}

• {2,4,5,6,7,8,10}

• {2, 4, 5, 6, 7, 8, 10

Let C={2, 5, 7, 10} and B={1, 3, 5, 7, 9}. Find C ∩ B

• {1,2,3,5,7,9,10}

• {2,4,5,6,7,8,10}

• {5,7}

If A = {1, 2, 3, 4, 5, 6}, B = {1, 2, 3, 5, 7, 9} and C = {3, 5, 6, 7, 8, 9}, what is (A ⋃ B) ⋂ C?

• {3, 4, 5, 6, 7, 9}

• {3, 4, 5, 6, 7, 8, 9}

• {3, 5, 6, 7, 9}

• { }

If ξ = {1, 2, 3, 4, 5, 6, 7, 8}, A = { 2, 4, 6, 8} and B ={1, 2, 3, 6} then (A∩B)′ is

• {1,2,3,4,5,7,8}

• {1,3,4,8}

• {1,3,4,5,7,8}

• {5,7}

If ξ = {1, 2, 3, 4, 5, 6, 7, 8}, A = { 2, 4, 6, 8} and B ={1, 2, 3, 6} then (AUB)′ is

• {1,2,3,4,5,7,8}

• {1,3,4,8}

• {1,3,4,5,7,8}

• {5,7}

If P = {0, 1, 2, 3, 4}, Q = {4, 6, 8} and R = {6, 12, 18}, then what is (P ∩ Q) ∪ R?

• {4}

• {4, 6}

• {4, 6, 8}

• {4, 6, 12, 18}

Given that ξ={1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}, A = {1, 3, 5, 15}, B = {2, 3, 5, 7} and C = {2, 4, 6, 8}.

What is (A U B)' ∩ C ?

• {4, 6, 8}

• {4, 6, 8, 9}

• {4, 6, 8, 9, 12}

• {4, 6, 8, 9, 12, 15}

Given that ξ = { x:10≤x≤30, x is an integer}, set F = { x: when x is divided by 5, the remainder is 3} , set G = { x: x can be divided exactly by 3} . List the elements of the set

F∩G

.

• ϕ

• {18}

• {18, 28}

• {13, 18, 23, 28}

Given the universal set ξ = {x: 1≤x≤10, x is an integer}, set K ={x: x multiple of 3}, set L = {x: x is a factor of 12}, set M = { 5, 6, 7, 8. Find n[(K∪L)′∩M]

• 1

• 2

• 3

• 4

If A = {letters of SECUNDRABAD} and B ={letters of BENGALURU}, then A - B is

• {S,E,C,U,N,D,R,A,B,G,L}

• {E,U,N,R,A,B}

• {S, C, D}

• {G, L}