Question

If n(A) = 2, 8(A), = 115 then n(s)?​

Answer 1

Step-by-step explanation:

n(A)=115,n(B)=326

n(A−B)=47

n(A)=n(A−B)+n(A∩B)

n(A∩B)=n(A)−n(A−B)

∴n(A∩B)=115−47=68

∴n(A∪B)=n(A)+n(B)−n(A∩B)

⇒n(A∪B)=115+326−68

⇒n(A∪B)=373