If P = { x : x N and x is a prime number}, then p is
Finite
Infinite
Null set
None
If f(x) = 1/x+1 g(x) = -x then gof is
-x + 1
-1/x+1
-(x + 1)
x2 - 1
If A = [1, 2}, B = {1, 2, 3, 4} then
B is a subset of A
A is a subset of B
A and B are equal sets
None of these
If A and B are any two sets, then A∩ (AUB) is equal to
A
B
Ac
Bc
In an interview 525 persons like to see Tamil films, 400 persons like to see Hindi films and 200 like both, then the number of persons interviewed is
700
725
600
925
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) = ?
40
78
2
none of these
Write the set B = { 2, 4, 8, 16, 32} in the set - builder form.
{ x: x = 2n; n N and 1 ≤ n ≤ 5 }
{x : x = 2n ; n N and 1 ≤ n ≤ 5 }
{x: x = n + 2; n N and 1 ≤ n ≤ 5}
{ x : x = n - 2 ; n N and 1 ≤ n ≤ 5}
Given n(U) = 20, n(A) = 12, n(B) = 9 , n(A∩B) = 4 , where U is the universal set, A and B are subsets of U then
n(A∪B) =
17
9
11
3
If A = {2, 3, 4}, B = {1, 3, 5, 7} U = {1, 2, 3.......8} then (A∪B)' is
{6, 8}
{1, 2, 3, 4, 6, 7}
{3}
{8}
