Which of the following is not a subset of {1,2,3,4}.
{1,2}
{2,3,4}
{1,3,4}
{2,4,5}
B - A =
{X/X B and XA}
{X/X B ; XA}
{X/XA;XB}
{X/X A or XB}
If , then A - B =
A
B
B - A
Φ
If A = {1,2,3,4,5,6}; B = {2,4}; C = {2,4,6,8} then A - ( B ∩ C ) =
{5,6}
{1,5,6}
{1,2,5,6}
Which of the following venn diagrams represent (A - B)?
In a class 16 students read Mathematics, 17 read science and 6 students read both subjects. So the number of students who read either Mathematics or science =
27
39
33
6
(AUB)-(A∩B)=
A Δ B
μ
Identify element in the intersection of two sets is:
0
μ'
A U A' =
A ∩ A'
A'
n(AUB) = 8; n(A∩B) = 2; n(A) = 3; So n(B) =
13
3
7
9
