The number of proper subsets of the set {1,2,3} is
8
7
6
5
In an interview 525 persons like to see Tamil films, 400 persons like to see Hindi films and 200 like to both, Then the number of persons interviewed is
700
725
600
925
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}
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}
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
If f(x) = 1/x and g(x) = -1/x then fog =
-x
1/x
-1/x
x
If A and B are disjoint,then n(A∪B) is equal to
n(A)
n(B)
n(A) + n(B)
n(A) * n(B)
Sets A and B have 3 and 6 elements respectively. What can be the minimum number of elements in A∪B ?
3
9
18
For any two sets A and B, ( A-B) U ( B- A) =
(A - B) U A
(B - A) UB
(AUB) - (A∩B)
(AUB) ∩ (A∩B)
If {(2, a), (b, 3)} represents an identity function then values of a and b are
2,2
3,2
2,3
3,3
