Question

Let n(U)=90,n(A)=50,n(B)=30,n(A∪B)=70 then find the correct statement 

options are in the picture​

Answer 1

Step-by-step explanation:

(c).n(A∩B)=n(A∪B)=n(u)−n(A∪B)=n(u)−{n(A)+n(B)−n(A∩B)}=700−{200+300−100}=300

Hope this will help you buddy...