Question

n(A) =11, n(B) =7, n(AUB) =13, then find AB=?​

Answer 1

Answer:

5

Step-by-step explanation:

n(AUB) =n(A) +n(B) -n(AB)

n(AB) =n(A)+n(B) -n(AUB)

n(AB) =11+7-13

n(AB) = 5