Question

,a=4,6,9,15,21 and=6,15,20,23 find aubandanb and verify that n(a)+n(b)=n(aub)+n(anb)

Answer 1

this is the answer

hope this helps u

Answer 2

n(a)= 5

n(b)= 4

a U b = (4 6 9 15 21) U (6 15 20 23)

=(4 6 9 15 20 21 23)

a n b = (4 6 9 15 21 ) n (6 15 20 23)

=( 6 15)

n(aUb) = 7 and n(anb) = 2

n (a) + n(b) = n(aUb) + n( anb)

5+ 4 = 7+ 2

9 = 9

Hence proved