The number of subsets of the set {10,11,12} is
3
8
6
7
The number of elements of the set{x : x Z, x2 = 1} is
2
1
0
Given A = {5,6,7,8}. Which one of the following is incorrect?
Φ A
{7,8,9}
{5}
If X = {a,{b,c},d}. Which of the following is a subset of X
{a,b}
{b,c}
{c,d}
{a,d}
Which of the following statements are true?i) For any set A, A is a proper subset of Aii) For any set A, is a subset of Aiii) For any set A, A is a subset of A
(i) and (ii)
(ii) and (iii)
(i) and (iii)
(i), (ii) and (iii)
If a finite set A has m elements, then the number of non-empty proper subsets of A is
2m
2m -1
2m-1
2(2m-1-1)
If A B, then A - B is
B
A
B - A
If A = {1,{5,6},4}. Which of the following is correct?
{5,6} A
{5} A
{7} A
{6} A
If A is a proper subset of B, then =
A∩B
If A is a proper subset of B, then A∩B =
