B - A is defined as
{x/x∈A, x∉B}
{x/x∈B, x∉A}
{x/x∈A, x∈B}
{x/x∈B, x∈A and B}
In a group of 65 people, 40 like cricket, 10 like both cricket and tennis. How many like tennis only and not cricket.
25
35
40
45
Sets A and B have 3 and 6 elements respectively. What can be the minimum number of elements in A∪B ?
3
6
9
18
If {(2, 7), (4, x)} represents constant function then the value of x is
2
4
7
-2
if f(x) = 1/x+1 g(x) = -x then gof is
-x + 1
-1/x+1
-(x + 1)
x2 - 1
The smallest set A such that A∪{1,2} = {1,2,3,5,9} is
{2,3,5}
{3,5,9}
{1,2,5,9}
none of these
The domain of the function f = {(1,2)(2,3)(3,4)(4,5)} is
{1,2,3,4}
{2,3,4,5}
{1,2,3,5}
{1,3,5}
If X and Y are two sets such that n(X) = 17, n(Y) = 23 and n(X∪Y) = 38. Then n (X∩Y) = ?
78
If f(x) = 3x + 1, then the preimage of 7 is
16
22
5
If A, B, C are three sets, then A∩(B∪C) is equal to
(A∪B) ∩ (A∪C)
(A∩B) ∪ (A∩C)
(A∪B) ∪ (A∩C)
