The group of beatiful girls is _______.
A null sets
A finite set
A singleton set
Not a set
If a set A contains 3 elemetns and another set B contains 6 elements, then the number of elements in AUB would be :
9
Either 8 or 9
Either 7 or 8 or 9
Either 6 or 7 or 8 or 9.
A set contains n elements. Then the power set contains ________.
n2 elements
n elements
(2n -1 ) elements
2n elements
If A = { x: x = 4n +1, 2 ≤ n ≤ 5 }, then number of subsets of A is ________.
16
15
4
None of these
( A ∩ B )c ∩ A is equal to _______.
B
A∩B
AUB
A - B
Two sets A and B are said to be __________,if they contain same elements.
Same
Equal
Equivalent
Unequal
If A = { x: x = n2, n = 1, 2, 3 }, then number of proper subsets is _______.
3
8
7
Out of 40 children 30 can swim, 27 can play chess and only 5 can do neither. How many children can swim only ?
30
22
12
n ( AUB ) is equal to ______.
n ( A) + n (B)
n ( A ) + n (B) - 2n (A∩B)
n(A) + n (B) - n (A∩B)
A set having no elements is called __________
Singleton
Empty
Finite
None
