Question

5. If n(A) = 20, n(B) = 50, n(AB) = 60 and n(B) = 20, find n(AB) and n(U)

Answer 1

Step-by-step explanation:

Since, n(A ∩ B) = n(A) + n(B) - n(A ∪ B) = 20 + 28 - 36

∴ n(A ∩ B) = 12