Question

A = {x:x is a composite number, x<15},
B = {x:x is a factor of 24}
check whether n(A-B) = n(B-A)=n(A intersection B)
or not​

Answer 1

Answer:

A=(4,6,8,9,10,12,14,)

B=(1,2,3,4,6,8,12,24 )

n(a-b)=(4,6,8,9,10,12,14)- (1,2,3,4,6,8,12,24)

=9,10,14

hence n(a-b)=3

n(b-a) =(1,2,3,4,6,8,12,24)-(4,6,8,9,10,12)

=1,2,3,24

=n(b-a) =4

and A interestionB =4,6,8,12

n(a intersection b)=4