Question

If n ( A) = 20, n (B)=28 and n ( A,U,B)= 36 then n(A n B)=?​

Answer 1

Answer:

Using the formula n(A∪B)=n(A)+n(B)−n(A∩B)

then, n(A∩B)=n(A)+n(B)−n(A∪B)

=20+28−36=48−36=12

Answer 2

Answer:

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

=20+28-36

=12

Step-by-step explanation:

hope it is the right answer thank you.