Question

If n(aUb)=5,n(a)=8,n(b)=7 find intersection of A and B

Answer 1

Answer:

If n(aUb)=5,n(a)=8,n(b)=7

n(aUb)=n(a)+n(b)-n(a∩b)

5=8+7-n(a∩b)

5=15-n(a∩b)

n(a∩b)=15-5

n(a∩b)=10

Step-by-step explanation:

Answer 2

Answer:

intersection of A and B =10

Step-by-step explanation:

n(A U B) = n(A) + n(B) - n (A intersect B)

= 8 + 7 - 5

= 15 - 5

= 10