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)
Which one of the following is correct?
{x : x2 = -1, x Z} =
= 0
= {0}
= {}
If A is a proper subset of B, then A∩B =
A
B
The shaded region in the adjoining diagram represents
A - B
B - A
A Δ B
A'
If A B, then A - B is
Given A = {5,6,7,8}. Which one of the following is incorrect?
Φ A
{7,8,9}
{5}
The number of elements of the set{x : x Z, x2 = 1} is
3
2
1
0
Which one of the following is incorrect?
Every subset of a finite set is finite
P ={x : x-8 = -8} is a singleton set
Every set has a proper subset
Every non-empty set has at least two subsets. and the set itself.
If A = {3,4,5,6} and B = {1,2,3,5,6}, then =
{1,2,3,4,5,6}
{1,2,3,4,6}
{1,2,5,6}
{3,4,5,6}
The shaded region in the figure represents
B'
